Merge https://github.com/TeamButter/android_kernel_motorola_msm8952 into HEAD

Change-Id: If93f26a108cb5259843a308006363fa349790494

58 files changed, 1078 insertions, 438 deletions

diff --git a/.gitignore b/.gitignore
index 3b8b9b33be3..7e9932e5547 100644
--- a/.gitignore
+++ b/.gitignore
@@ -29,6 +29,7 @@ modules.builtin
 *.bz2
 *.lzma
 *.xz
+*.lz4
 *.lzo
 *.patch
 *.gcno
diff --git a/Documentation/x86/boot.txt b/Documentation/x86/boot.txt
index 3840b6f28af..fc66d42422e 100644
--- a/Documentation/x86/boot.txt
+++ b/Documentation/x86/boot.txt
@@ -657,9 +657,10 @@ Protocol:	2.08+
   uncompressed data should be determined using the standard magic
   numbers.  The currently supported compression formats are gzip
   (magic numbers 1F 8B or 1F 9E), bzip2 (magic number 42 5A), LZMA
-  (magic number 5D 00), and XZ (magic number FD 37).  The uncompressed
-  payload is currently always ELF (magic number 7F 45 4C 46).
-  
+  (magic number 5D 00), XZ (magic number FD 37), and LZ4 (magic number
+  02 21).  The uncompressed payload is currently always ELF (magic
+  number 7F 45 4C 46).
+
 Field name:	payload_length
 Type:		read
 Offset/size:	0x24c/4
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 044cfade545..0103298516e 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -42,6 +42,7 @@ config ARM
 	select HAVE_IDE if PCI || ISA || PCMCIA
 	select HAVE_IRQ_TIME_ACCOUNTING
 	select HAVE_KERNEL_GZIP
+	select HAVE_KERNEL_LZ4
 	select HAVE_KERNEL_LZMA
 	select HAVE_KERNEL_LZO
 	select HAVE_KERNEL_XZ
diff --git a/arch/arm/boot/compressed/.gitignore b/arch/arm/boot/compressed/.gitignore
index f79a08efe00..47279aa96a6 100644
--- a/arch/arm/boot/compressed/.gitignore
+++ b/arch/arm/boot/compressed/.gitignore
@@ -6,6 +6,7 @@ piggy.gzip
 piggy.lzo
 piggy.lzma
 piggy.xzkern
+piggy.lz4
 vmlinux
 vmlinux.lds
 
diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile
index 120b83bfde2..f3d6532d40d 100644
--- a/arch/arm/boot/compressed/Makefile
+++ b/arch/arm/boot/compressed/Makefile
@@ -27,6 +27,9 @@ OBJS	+= misc.o decompress.o
 ifeq ($(CONFIG_DEBUG_UNCOMPRESS),y)
 OBJS	+= debug.o
 endif
+ifeq ($(CONFIG_KERNEL_LZ4),y)
+CFLAGS_decompress.o := -Os
+endif
 FONTC	= $(srctree)/drivers/video/console/font_acorn_8x8.c
 
 # string library code (-Os is enforced to keep it much smaller)
@@ -91,6 +94,7 @@ suffix_$(CONFIG_KERNEL_GZIP) = gzip
 suffix_$(CONFIG_KERNEL_LZO)  = lzo
 suffix_$(CONFIG_KERNEL_LZMA) = lzma
 suffix_$(CONFIG_KERNEL_XZ)   = xzkern
+suffix_$(CONFIG_KERNEL_LZ4)  = lz4
 
 # Borrowed libfdt files for the ATAG compatibility mode
 
@@ -115,7 +119,7 @@ targets       := vmlinux vmlinux.lds \
 		 font.o font.c head.o misc.o $(OBJS)
 
 # Make sure files are removed during clean
-extra-y       += piggy.gzip piggy.lzo piggy.lzma piggy.xzkern \
+extra-y       += piggy.gzip piggy.lzo piggy.lzma piggy.xzkern piggy.lz4 \
 		 lib1funcs.S ashldi3.S $(libfdt) $(libfdt_hdrs) \
 		 hyp-stub.S
 
diff --git a/arch/arm/boot/compressed/decompress.c b/arch/arm/boot/compressed/decompress.c
index 24b0475cb8b..a0765e7ed6c 100644
--- a/arch/arm/boot/compressed/decompress.c
+++ b/arch/arm/boot/compressed/decompress.c
@@ -51,7 +51,11 @@ extern char * strstr(const char * s1, const char *s2);
 #include "../../../../lib/decompress_unxz.c"
 #endif
 
+#ifdef CONFIG_KERNEL_LZ4
+#include "../../../../lib/decompress_unlz4.c"
+#endif
+
 int do_decompress(u8 *input, int len, u8 *output, void (*error)(char *x))
 {
-	return decompress(input, len, NULL, NULL, output, NULL, error);
+	return __decompress(input, len, NULL, NULL, output, 0, NULL, error);
 }
diff --git a/arch/arm/boot/compressed/piggy.lz4.S b/arch/arm/boot/compressed/piggy.lz4.S
new file mode 100644
index 00000000000..3d9a575618a
--- /dev/null
+++ b/arch/arm/boot/compressed/piggy.lz4.S
@@ -0,0 +1,6 @@
+	.section .piggydata,#alloc
+	.globl	input_data
+input_data:
+	.incbin	"arch/arm/boot/compressed/piggy.lz4"
+	.globl	input_data_end
+input_data_end:
diff --git a/arch/arm/boot/dts/qcom/msm8952.dtsi b/arch/arm/boot/dts/qcom/msm8952.dtsi
index 9da8c58c1c2..e22492f2f07 100644
--- a/arch/arm/boot/dts/qcom/msm8952.dtsi
+++ b/arch/arm/boot/dts/qcom/msm8952.dtsi
@@ -228,7 +228,8 @@
 			< 1094400000 4>,
 			< 1344000000 5>,
 			< 1440000000 6>,
-			< 1516800000 7>;
+			< 1516800000 7>,
+ 			< 1651200000 8>;
 
 		qcom,speed0-bin-v0-cci =
 			<          0 0>,
@@ -253,7 +254,8 @@
 			< 1094400000 4>,
 			< 1344000000 5>,
 			< 1440000000 6>,
-			< 1516800000 7>;
+			< 1516800000 7>,
+                        < 1651200000 8>; 
 
 		qcom,speed1-bin-v0-cci =
 			<          0 0>,
@@ -366,11 +368,13 @@
 		cpubw-cpufreq {
 		target-dev = <&cpubw>;
 		cpu-to-dev-map-0 =
+                        <  400000  2929 >,	/* SVS   */
 			< 1094400  5346 >,	/* SVS+  */
 			< 1344000  5712 >,	/* NOM   */
 			< 1440000  6152 >,	/* NOM+  */
 			< 1651200  7031 >;	/* TURBO */
 		cpu-to-dev-map-4 =
+                        <  400000  2929 >,	/* SVS   */
 			<  806400  5346 >,	/* SVS+  */
 			<  998400  5712 >,	/* NOM   */
 			< 1094400  6152 >,	/* NOM+  */
@@ -390,10 +394,12 @@
 		cci-cpufreq {
 		target-dev = <&cci_cache>;
 		cpu-to-dev-map-0 =
+                        <  500000  200000 >,
 			<  960000  307200 >,
 			< 1344000  403200 >,
 			< 1651200  600000 >;
 		cpu-to-dev-map-4 =
+                        <  400000  200000 >, 
 			<  806400  307200 >,
 			<  998400  403200 >,
 			< 1209600  600000 >;
@@ -419,14 +425,32 @@
 		qcom,governor-per-policy;
 
 		qcom,cpufreq-table-0 =
+                         <  345600 >,
+                         <  422400 >,
+			 <  499200 >,
+                         <  652800 >,
+                         <  729600 >,
+ 			 <  800000 >,
 			 <  960000 >,
 			 < 1094400 >,
+                         < 1113600 >,
+                         < 1267200 >,  
 			 < 1344000 >,
 			 < 1440000 >,
 			 < 1516800 >,
 			 < 1651200 >;
 		qcom,cpufreq-table-4 =
+                         <  249600 >,
+                         <  307200 >,
+                         <  345600 >,
+                         <  384000 >, 
+			 <  403200 >,
+                         <  460800 >,
+                         <  518400 >,
+ 			 <  533330 >,
 			 <  806400 >,
+                         <  844800 >,
+                         <  921600 >,
 			 <  998400 >,
 			 < 1094400 >,
 			 < 1209600 >;
@@ -754,9 +778,9 @@
 		qcom,msm-bus,num-cases = <3>;
 		qcom,msm-bus,num-paths = <1>;
 		qcom,msm-bus,vectors-KBps =
-		<90 512 0 0>,              /* No vote (ab=0 Mbps, ib=0 Mbps – NO BIMC vote) */
-		<90 512 100000 800000>,    /* SVS  - (ab=100Mbps, ib=800Mbps – 50MHz BIMC freq) */
-		<90 512 100000 1200000>;   /* PERF - (ab=100Mbps, ib=1200Mbps – 75MHz BIMC freq) */
+		<90 512 0 0>,              /* No vote (ab=0 Mbps, ib=0 Mbps \96 NO BIMC vote) */
+		<90 512 100000 800000>,    /* SVS  - (ab=100Mbps, ib=800Mbps \96 50MHz BIMC freq) */
+		<90 512 100000 1200000>;   /* PERF - (ab=100Mbps, ib=1200Mbps \96 75MHz BIMC freq) */
 		qcom,bus-vector-names = "MIN", "SVS", "PERF";
 		qcom,tethered-flow-control;
 	};
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 9d49bea25a6..744b6e3b39e 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -470,9 +470,7 @@ config SWP_EMULATE
 
 	  If unsure, say Y.
 
-config HZ
-	int
-	default 100
+source kernel/Kconfig.hz
 
 config ARCH_HAS_HOLES_MEMORYMODEL
 	def_bool y if SPARSEMEM
diff --git a/arch/arm64/configs/lineage_athene_defconfig b/arch/arm64/configs/lineage_athene_defconfig
index de3c5691ecf..4c51c0e54cf 100644
--- a/arch/arm64/configs/lineage_athene_defconfig
+++ b/arch/arm64/configs/lineage_athene_defconfig
@@ -318,7 +318,7 @@ CONFIG_HOTPLUG_CPU=y
 CONFIG_PREEMPT=y
 CONFIG_PREEMPT_COUNT=y
 CONFIG_SWP_EMULATE=y
-CONFIG_HZ=100
+CONFIG_HZ_300=y
 CONFIG_ARCH_HAS_HOLES_MEMORYMODEL=y
 CONFIG_ARCH_SPARSEMEM_ENABLE=y
 CONFIG_ARCH_SPARSEMEM_DEFAULT=y
@@ -579,7 +579,6 @@ CONFIG_NF_CONNTRACK_NETBIOS_NS=y
 # CONFIG_NF_CONNTRACK_SNMP is not set
 CONFIG_NF_CONNTRACK_PPTP=y
 CONFIG_NF_CONNTRACK_SANE=y
-CONFIG_NF_CONNTRACK_SIP=y
 CONFIG_NF_CONNTRACK_TFTP=y
 CONFIG_NF_CT_NETLINK=y
 # CONFIG_NF_CT_NETLINK_TIMEOUT is not set
@@ -2788,6 +2787,7 @@ CONFIG_HID_ELECOM=y
 # CONFIG_HID_LCPOWER is not set
 # CONFIG_HID_LENOVO_TPKBD is not set
 # CONFIG_HID_LOGITECH is not set
+CONFIG_HID_FIIO=y
 CONFIG_HID_MAGICMOUSE=y
 CONFIG_HID_MICROSOFT=y
 # CONFIG_HID_MONTEREY is not set
@@ -3796,6 +3796,7 @@ CONFIG_MAGIC_SYSRQ=y
 # CONFIG_READABLE_ASM is not set
 # CONFIG_UNUSED_SYMBOLS is not set
 # CONFIG_PAGE_OWNER is not set
+# CONFIG_SYSRQ_SCHED_DEBUG is not set
 CONFIG_DEBUG_FS=y
 # CONFIG_HEADERS_CHECK is not set
 # CONFIG_DEBUG_SECTION_MISMATCH is not set
@@ -3807,7 +3808,6 @@ CONFIG_PANIC_ON_OOPS_VALUE=0
 # CONFIG_PANIC_ON_RECURSIVE_FAULT is not set
 # CONFIG_DETECT_HUNG_TASK is not set
 # CONFIG_SCHED_DEBUG is not set
-CONFIG_PANIC_ON_RT_THROTTLING=y
 CONFIG_SCHEDSTATS=y
 CONFIG_TIMER_STATS=y
 # CONFIG_DEBUG_OBJECTS is not set
diff --git a/arch/arm64/kernel/topology.c b/arch/arm64/kernel/topology.c
index 1047d3535d2..ec22b937b9e 100644
--- a/arch/arm64/kernel/topology.c
+++ b/arch/arm64/kernel/topology.c
@@ -337,16 +337,13 @@ static void __init parse_dt_cpu_power(void)
 		cpu_capacity(cpu) = capacity;
 	}
 
-	/* If min and max capacities are equal we bypass the update of the
-	 * cpu_scale because all CPUs have the same capacity. Otherwise, we
-	 * compute a middle_capacity factor that will ensure that the capacity
+	/* compute a middle_capacity factor that will ensure that the capacity
 	 * of an 'average' CPU of the system will be as close as possible to
 	 * SCHED_POWER_SCALE, which is the default value, but with the
 	 * constraint explained near table_efficiency[].
 	 */
-	if (min_capacity == max_capacity)
-		return;
-	else if (4 * max_capacity < (3 * (max_capacity + min_capacity)))
+        // TheCrazyLex@PA apply fix for cpu calculation by Jorge Ramirez-Ortiz
+	if (4 * max_capacity < (3 * (max_capacity + min_capacity)))
 		middle_capacity = (min_capacity + max_capacity)
 				>> (SCHED_POWER_SHIFT+1);
 	else
diff --git a/arch/arm64/lib/memcmp.S b/arch/arm64/lib/memcmp.S
index 6ea0776ba6d..120dc3f74b8 100644
--- a/arch/arm64/lib/memcmp.S
+++ b/arch/arm64/lib/memcmp.S
@@ -1,258 +1,132 @@
 /*
- * Copyright (C) 2013 ARM Ltd.
- * Copyright (C) 2013 Linaro.
+ * Copyright (c) 2017 ARM Ltd
+ * All rights reserved.
  *
- * This code is based on glibc cortex strings work originally authored by Linaro
- * and re-licensed under GPLv2 for the Linux kernel. The original code can
- * be found @
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the company may not be used to endorse or promote
+ *    products derived from this software without specific prior written
+ *    permission.
  *
- * http://bazaar.launchpad.net/~linaro-toolchain-dev/cortex-strings/trunk/
- * files/head:/src/aarch64/
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
+ * THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL ARM LTD BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/* Assumptions:
  *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ * ARMv8-a, AArch64, unaligned accesses.
  */
 
+/* includes here */
 #include <linux/linkage.h>
 #include <asm/assembler.h>
 
-/*
-* compare memory areas(when two memory areas' offset are different,
-* alignment handled by the hardware)
-*
-* Parameters:
-*  x0 - const memory area 1 pointer
-*  x1 - const memory area 2 pointer
-*  x2 - the maximal compare byte length
-* Returns:
-*  x0 - a compare result, maybe less than, equal to, or greater than ZERO
-*/
-
 /* Parameters and result.  */
-src1		.req	x0
-src2		.req	x1
-limit		.req	x2
-result		.req	x0
+#define src1		x0
+#define src2		x1
+#define limit		x2
+#define result		w0
 
 /* Internal variables.  */
-data1		.req	x3
-data1w		.req	w3
-data2		.req	x4
-data2w		.req	w4
-has_nul		.req	x5
-diff		.req	x6
-endloop		.req	x7
-tmp1		.req	x8
-tmp2		.req	x9
-tmp3		.req	x10
-pos		.req	x11
-limit_wd	.req	x12
-mask		.req	x13
-
+#define data1		x3
+#define data1w		w3
+#define data2		x4
+#define data2w		w4
+#define tmp1		x5
+
+/* Small inputs of less than 8 bytes are handled separately.  This allows the
+   main code to be sped up using unaligned loads since there are now at least
+   8 bytes to be compared.  If the first 8 bytes are equal, align src1.
+   This ensures each iteration does at most one unaligned access even if both
+   src1 and src2 are unaligned, and mutually aligned inputs behave as if
+   aligned.  After the main loop, process the last 8 bytes using unaligned
+   accesses.  */
+
+.p2align 6
 ENTRY(memcmp)
-	cbz	limit, .Lret0
-	eor	tmp1, src1, src2
-	tst	tmp1, #7
-	b.ne	.Lmisaligned8
-	ands	tmp1, src1, #7
-	b.ne	.Lmutual_align
-	sub	limit_wd, limit, #1 /* limit != 0, so no underflow.  */
-	lsr	limit_wd, limit_wd, #3 /* Convert to Dwords.  */
-	/*
-	* The input source addresses are at alignment boundary.
-	* Directly compare eight bytes each time.
-	*/
-.Lloop_aligned:
-	ldr	data1, [src1], #8
-	ldr	data2, [src2], #8
-.Lstart_realigned:
-	subs	limit_wd, limit_wd, #1
-	eor	diff, data1, data2	/* Non-zero if differences found.  */
-	csinv	endloop, diff, xzr, cs	/* Last Dword or differences.  */
-	cbz	endloop, .Lloop_aligned
-
-	/* Not reached the limit, must have found a diff.  */
-	tbz	limit_wd, #63, .Lnot_limit
-
-	/* Limit % 8 == 0 => the diff is in the last 8 bytes. */
-	ands	limit, limit, #7
-	b.eq	.Lnot_limit
-	/*
-	* The remained bytes less than 8. It is needed to extract valid data
-	* from last eight bytes of the intended memory range.
-	*/
-	lsl	limit, limit, #3	/* bytes-> bits.  */
-	mov	mask, #~0
-CPU_BE( lsr	mask, mask, limit )
-CPU_LE( lsl	mask, mask, limit )
-	bic	data1, data1, mask
-	bic	data2, data2, mask
-
-	orr	diff, diff, mask
-	b	.Lnot_limit
-
-.Lmutual_align:
-	/*
-	* Sources are mutually aligned, but are not currently at an
-	* alignment boundary. Round down the addresses and then mask off
-	* the bytes that precede the start point.
-	*/
-	bic	src1, src1, #7
-	bic	src2, src2, #7
-	ldr	data1, [src1], #8
-	ldr	data2, [src2], #8
-	/*
-	* We can not add limit with alignment offset(tmp1) here. Since the
-	* addition probably make the limit overflown.
-	*/
-	sub	limit_wd, limit, #1/*limit != 0, so no underflow.*/
-	and	tmp3, limit_wd, #7
-	lsr	limit_wd, limit_wd, #3
-	add	tmp3, tmp3, tmp1
-	add	limit_wd, limit_wd, tmp3, lsr #3
-	add	limit, limit, tmp1/* Adjust the limit for the extra.  */
-
-	lsl	tmp1, tmp1, #3/* Bytes beyond alignment -> bits.*/
-	neg	tmp1, tmp1/* Bits to alignment -64.  */
-	mov	tmp2, #~0
-	/*mask off the non-intended bytes before the start address.*/
-CPU_BE( lsl	tmp2, tmp2, tmp1 )/*Big-endian.Early bytes are at MSB*/
-	/* Little-endian.  Early bytes are at LSB.  */
-CPU_LE( lsr	tmp2, tmp2, tmp1 )
-
-	orr	data1, data1, tmp2
-	orr	data2, data2, tmp2
-	b	.Lstart_realigned
-
-	/*src1 and src2 have different alignment offset.*/
-.Lmisaligned8:
-	cmp	limit, #8
-	b.lo	.Ltiny8proc /*limit < 8: compare byte by byte*/
-
-	and	tmp1, src1, #7
-	neg	tmp1, tmp1
-	add	tmp1, tmp1, #8/*valid length in the first 8 bytes of src1*/
-	and	tmp2, src2, #7
-	neg	tmp2, tmp2
-	add	tmp2, tmp2, #8/*valid length in the first 8 bytes of src2*/
-	subs	tmp3, tmp1, tmp2
-	csel	pos, tmp1, tmp2, hi /*Choose the maximum.*/
-
-	sub	limit, limit, pos
-	/*compare the proceeding bytes in the first 8 byte segment.*/
-.Ltinycmp:
-	ldrb	data1w, [src1], #1
-	ldrb	data2w, [src2], #1
-	subs	pos, pos, #1
-	ccmp	data1w, data2w, #0, ne  /* NZCV = 0b0000.  */
-	b.eq	.Ltinycmp
-	cbnz	pos, 1f /*diff occurred before the last byte.*/
+	subs	limit, limit, 8
+	b.lo	.Lless8
+
+	/* Limit >= 8, so check first 8 bytes using unaligned loads.  */
+	ldr	data1, [src1], 8
+	ldr	data2, [src2], 8
+	and	tmp1, src1, 7
+	add	limit, limit, tmp1
+	cmp	data1, data2
+	bne	.Lreturn
+
+	/* Align src1 and adjust src2 with bytes not yet done.  */
+	sub	src1, src1, tmp1
+	sub	src2, src2, tmp1
+
+	subs	limit, limit, 8
+	b.ls	.Llast_bytes
+
+	/* Loop performing 8 bytes per iteration using aligned src1.
+	   Limit is pre-decremented by 8 and must be larger than zero.
+	   Exit if <= 8 bytes left to do or if the data is not equal.  */
+	.p2align 4
+.Lloop8:
+	ldr	data1, [src1], 8
+	ldr	data2, [src2], 8
+	subs	limit, limit, 8
+	ccmp	data1, data2, 0, hi  /* NZCV = 0b0000.  */
+	b.eq	.Lloop8
+
+	cmp	data1, data2
+	bne	.Lreturn
+
+	/* Compare last 1-8 bytes using unaligned access.  */
+.Llast_bytes:
+	ldr	data1, [src1, limit]
+	ldr	data2, [src2, limit]
+
+	/* Compare data bytes and set return value to 0, -1 or 1.  */
+.Lreturn:
+#ifndef __AARCH64EB__
+	rev	data1, data1
+	rev	data2, data2
+#endif
+	cmp     data1, data2
+.Lret_eq:
+	cset	result, ne
+	cneg	result, result, lo
+        ret
+
+	.p2align 4
+	/* Compare up to 8 bytes.  Limit is [-8..-1].  */
+.Lless8:
+	adds	limit, limit, 4
+	b.lo	.Lless4
+	ldr	data1w, [src1], 4
+	ldr	data2w, [src2], 4
 	cmp	data1w, data2w
-	b.eq	.Lstart_align
-1:
-	sub	result, data1, data2
-	ret
-
-.Lstart_align:
-	lsr	limit_wd, limit, #3
-	cbz	limit_wd, .Lremain8
-
-	ands	xzr, src1, #7
-	b.eq	.Lrecal_offset
-	/*process more leading bytes to make src1 aligned...*/
-	add	src1, src1, tmp3 /*backwards src1 to alignment boundary*/
-	add	src2, src2, tmp3
-	sub	limit, limit, tmp3
-	lsr	limit_wd, limit, #3
-	cbz	limit_wd, .Lremain8
-	/*load 8 bytes from aligned SRC1..*/
-	ldr	data1, [src1], #8
-	ldr	data2, [src2], #8
-
-	subs	limit_wd, limit_wd, #1
-	eor	diff, data1, data2  /*Non-zero if differences found.*/
-	csinv	endloop, diff, xzr, ne
-	cbnz	endloop, .Lunequal_proc
-	/*How far is the current SRC2 from the alignment boundary...*/
-	and	tmp3, tmp3, #7
-
-.Lrecal_offset:/*src1 is aligned now..*/
-	neg	pos, tmp3
-.Lloopcmp_proc:
-	/*
-	* Divide the eight bytes into two parts. First,backwards the src2
-	* to an alignment boundary,load eight bytes and compare from
-	* the SRC2 alignment boundary. If all 8 bytes are equal,then start
-	* the second part's comparison. Otherwise finish the comparison.
-	* This special handle can garantee all the accesses are in the
-	* thread/task space in avoid to overrange access.
-	*/
-	ldr	data1, [src1,pos]
-	ldr	data2, [src2,pos]
-	eor	diff, data1, data2  /* Non-zero if differences found.  */
-	cbnz	diff, .Lnot_limit
-
-	/*The second part process*/
-	ldr	data1, [src1], #8
-	ldr	data2, [src2], #8
-	eor	diff, data1, data2  /* Non-zero if differences found.  */
-	subs	limit_wd, limit_wd, #1
-	csinv	endloop, diff, xzr, ne/*if limit_wd is 0,will finish the cmp*/
-	cbz	endloop, .Lloopcmp_proc
-.Lunequal_proc:
-	cbz	diff, .Lremain8
-
-/*There is differnence occured in the latest comparison.*/
-.Lnot_limit:
-/*
-* For little endian,reverse the low significant equal bits into MSB,then
-* following CLZ can find how many equal bits exist.
-*/
-CPU_LE( rev	diff, diff )
-CPU_LE( rev	data1, data1 )
-CPU_LE( rev	data2, data2 )
-
-	/*
-	* The MS-non-zero bit of DIFF marks either the first bit
-	* that is different, or the end of the significant data.
-	* Shifting left now will bring the critical information into the
-	* top bits.
-	*/
-	clz	pos, diff
-	lsl	data1, data1, pos
-	lsl	data2, data2, pos
-	/*
-	* We need to zero-extend (char is unsigned) the value and then
-	* perform a signed subtraction.
-	*/
-	lsr	data1, data1, #56
-	sub	result, data1, data2, lsr #56
+	b.ne	.Lreturn
+	sub	limit, limit, 4
+.Lless4:
+	adds	limit, limit, 4
+	beq	.Lret_eq
+.Lbyte_loop:
+	ldrb	data1w, [src1], 1
+	ldrb	data2w, [src2], 1
+	subs	limit, limit, 1
+	ccmp	data1w, data2w, 0, ne	/* NZCV = 0b0000.  */
+	b.eq	.Lbyte_loop
+	sub	result, data1w, data2w
 	ret
+END(memcmp)
 
-.Lremain8:
-	/* Limit % 8 == 0 =>. all data are equal.*/
-	ands	limit, limit, #7
-	b.eq	.Lret0
-
-.Ltiny8proc:
-	ldrb	data1w, [src1], #1
-	ldrb	data2w, [src2], #1
-	subs	limit, limit, #1
-
-	ccmp	data1w, data2w, #0, ne  /* NZCV = 0b0000. */
-	b.eq	.Ltiny8proc
-	sub	result, data1, data2
-	ret
-.Lret0:
-	mov	result, #0
-	ret
-ENDPROC(memcmp)
diff --git a/arch/arm64/lib/strcmp.S b/arch/arm64/lib/strcmp.S
index 42f828b06c5..355402528f9 100644
--- a/arch/arm64/lib/strcmp.S
+++ b/arch/arm64/lib/strcmp.S
@@ -61,6 +61,12 @@ zeroones	.req	x10
 pos		.req	x11
 
 ENTRY(strcmp)
+	prfm    pldl1strm, [src1]
+	prfm    pldl1strm, [src2]
+	b	.Lperf_critical
+.align  6
+.Lperf_critical:
+	/* Start of performance-critical section  -- one 64B cache line.  */
 	eor	tmp1, src1, src2
 	mov	zeroones, #REP8_01
 	tst	tmp1, #7
@@ -77,6 +83,8 @@ ENTRY(strcmp)
 	ldr	data1, [src1], #8
 	ldr	data2, [src2], #8
 .Lstart_realigned:
+	prfm    pldl1strm, [src1]
+	prfm    pldl1strm, [src2]
 	sub	tmp1, data1, zeroones
 	orr	tmp2, data1, #REP8_7f
 	eor	diff, data1, data2	/* Non-zero if differences found.  */
diff --git a/arch/arm64/lib/strrchr.S b/arch/arm64/lib/strrchr.S
index 61eabd9a289..82b5f1030c3 100644
--- a/arch/arm64/lib/strrchr.S
+++ b/arch/arm64/lib/strrchr.S
@@ -1,43 +1,171 @@
 /*
- * Based on arch/arm/lib/strrchr.S
- *
- * Copyright (C) 1995-2000 Russell King
- * Copyright (C) 2013 ARM Ltd.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
+   Copyright (c) 2014, ARM Limited
+   All rights Reserved.
+
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions are met:
+       * Redistributions of source code must retain the above copyright
+         notice, this list of conditions and the following disclaimer.
+       * Redistributions in binary form must reproduce the above copyright
+         notice, this list of conditions and the following disclaimer in the
+         documentation and/or other materials provided with the distribution.
+       * Neither the name of the company nor the names of its contributors
+         may be used to endorse or promote products derived from this
+         software without specific prior written permission.
+
+   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+   HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.  */
 
 #include <linux/linkage.h>
 #include <asm/assembler.h>
 
-/*
- * Find the last occurrence of a character in a string.
+/* Assumptions:
  *
- * Parameters:
- *	x0 - str
- *	x1 - c
- * Returns:
- *	x0 - address of last occurrence of 'c' or 0
+ * ARMv8-a, AArch64
+ * Neon Available.
  */
+
+/* Arguments and results.  */
+#define srcin		x0
+#define chrin		w1
+
+#define result		x0
+
+#define src		x2
+#define	tmp1		x3
+#define wtmp2		w4
+#define tmp3		x5
+#define src_match	x6
+#define src_offset	x7
+#define const_m1	x8
+#define tmp4		x9
+#define nul_match	x10
+#define chr_match	x11
+
+#define vrepchr		v0
+#define vdata1		v1
+#define vdata2		v2
+#define vhas_nul1	v3
+#define vhas_nul2	v4
+#define vhas_chr1	v5
+#define vhas_chr2	v6
+#define vrepmask_0	v7
+#define vrepmask_c	v16
+#define vend1		v17
+#define vend2		v18
+
+/* Core algorithm.
+
+   For each 32-byte hunk we calculate a 64-bit syndrome value, with
+   two bits per byte (LSB is always in bits 0 and 1, for both big
+   and little-endian systems).  For each tuple, bit 0 is set iff
+   the relevant byte matched the requested character; bit 1 is set
+   iff the relevant byte matched the NUL end of string (we trigger
+   off bit0 for the special case of looking for NUL).  Since the bits
+   in the syndrome reflect exactly the order in which things occur
+   in the original string a count_trailing_zeros() operation will
+   identify exactly which byte is causing the termination, and why.  */
+
+/* Locals and temporaries.  */
+
 ENTRY(strrchr)
-	mov	x3, #0
-	and	w1, w1, #0xff
-1:	ldrb	w2, [x0], #1
-	cbz	w2, 2f
-	cmp	w2, w1
-	b.ne	1b
-	sub	x3, x0, #1
-	b	1b
-2:	mov	x0, x3
+	/* Magic constant 0x40100401 to allow us to identify which lane
+	   matches the requested byte.  Magic constant 0x80200802 used
+	   similarly for NUL termination.  */
+	mov	wtmp2, #0x0401
+	movk	wtmp2, #0x4010, lsl #16
+	dup	vrepchr.16b, chrin
+	bic	src, srcin, #31		/* Work with aligned 32-byte hunks.  */
+	dup	vrepmask_c.4s, wtmp2
+	mov	src_offset, #0
+	ands	tmp1, srcin, #31
+	add	vrepmask_0.4s, vrepmask_c.4s, vrepmask_c.4s /* equiv: lsl #1 */
+	b.eq	.Laligned
+
+	/* Input string is not 32-byte aligned.  Rather than forcing
+	   the padding bytes to a safe value, we calculate the syndrome
+	   for all the bytes, but then mask off those bits of the
+	   syndrome that are related to the padding.  */
+	ld1	{vdata1.16b, vdata2.16b}, [src], #32
+	neg	tmp1, tmp1
+	cmeq	vhas_nul1.16b, vdata1.16b, #0
+	cmeq	vhas_chr1.16b, vdata1.16b, vrepchr.16b
+	cmeq	vhas_nul2.16b, vdata2.16b, #0
+	cmeq	vhas_chr2.16b, vdata2.16b, vrepchr.16b
+	and	vhas_nul1.16b, vhas_nul1.16b, vrepmask_0.16b
+	and	vhas_chr1.16b, vhas_chr1.16b, vrepmask_c.16b
+	and	vhas_nul2.16b, vhas_nul2.16b, vrepmask_0.16b
+	and	vhas_chr2.16b, vhas_chr2.16b, vrepmask_c.16b
+	addp	vhas_nul1.16b, vhas_nul1.16b, vhas_nul2.16b	// 256->128
+	addp	vhas_chr1.16b, vhas_chr1.16b, vhas_chr2.16b	// 256->128
+	addp	vhas_nul1.16b, vhas_nul1.16b, vhas_nul1.16b	// 128->64
+	addp	vhas_chr1.16b, vhas_chr1.16b, vhas_chr1.16b	// 128->64
+	mov	nul_match, vhas_nul1.d[0]
+	lsl	tmp1, tmp1, #1
+	mov	const_m1, #~0
+	mov	chr_match, vhas_chr1.d[0]
+	lsr	tmp3, const_m1, tmp1
+
+	bic	nul_match, nul_match, tmp3	// Mask padding bits.
+	bic	chr_match, chr_match, tmp3	// Mask padding bits.
+	cbnz	nul_match, .Ltail
+
+.Lloop:
+	cmp	chr_match, #0
+	csel	src_match, src, src_match, ne
+	csel	src_offset, chr_match, src_offset, ne
+.Laligned:
+	ld1	{vdata1.16b, vdata2.16b}, [src], #32
+	cmeq	vhas_nul1.16b, vdata1.16b, #0
+	cmeq	vhas_chr1.16b, vdata1.16b, vrepchr.16b
+	cmeq	vhas_nul2.16b, vdata2.16b, #0
+	cmeq	vhas_chr2.16b, vdata2.16b, vrepchr.16b
+	addp	vend1.16b, vhas_nul1.16b, vhas_nul2.16b	// 256->128
+	and	vhas_chr1.16b, vhas_chr1.16b, vrepmask_c.16b
+	and	vhas_chr2.16b, vhas_chr2.16b, vrepmask_c.16b
+	addp	vhas_chr1.16b, vhas_chr1.16b, vhas_chr2.16b	// 256->128
+	addp	vend1.16b, vend1.16b, vend1.16b	// 128->64
+	addp	vhas_chr1.16b, vhas_chr1.16b, vhas_chr1.16b	// 128->64
+	mov	nul_match, vend1.d[0]
+	mov	chr_match, vhas_chr1.d[0]
+	cbz	nul_match, .Lloop
+
+	and	vhas_nul1.16b, vhas_nul1.16b, vrepmask_0.16b
+	and	vhas_nul2.16b, vhas_nul2.16b, vrepmask_0.16b
+	addp	vhas_nul1.16b, vhas_nul1.16b, vhas_nul2.16b
+	addp	vhas_nul1.16b, vhas_nul1.16b, vhas_nul1.16b
+	mov	nul_match, vhas_nul1.d[0]
+
+.Ltail:
+	/* Work out exactly where the string ends.  */
+	sub	tmp4, nul_match, #1
+	eor	tmp4, tmp4, nul_match
+	ands	chr_match, chr_match, tmp4
+	/* And pick the values corresponding to the last match.  */
+	csel	src_match, src, src_match, ne
+	csel	src_offset, chr_match, src_offset, ne
+
+	/* Count down from the top of the syndrome to find the last match.  */
+	clz	tmp3, src_offset
+	/* Src_match points beyond the word containing the match, so we can
+	   simply subtract half the bit-offset into the syndrome.  Because
+	   we are counting down, we need to go back one more character.  */
+	add	tmp3, tmp3, #2
+	sub	result, src_match, tmp3, lsr #1
+	/* But if the syndrome shows no match was found, then return NULL.  */
+	cmp	src_offset, #0
+	csel	result, result, xzr, ne
+
 	ret
-ENDPROC(strrchr)
+
+END(strrchr)
+
diff --git a/arch/m32r/boot/compressed/misc.c b/arch/m32r/boot/compressed/misc.c
index 28a09529f20..3a769274586 100644
--- a/arch/m32r/boot/compressed/misc.c
+++ b/arch/m32r/boot/compressed/misc.c
@@ -86,6 +86,7 @@ decompress_kernel(int mmu_on, unsigned char *zimage_data,
 	free_mem_end_ptr = free_mem_ptr + BOOT_HEAP_SIZE;
 
 	puts("\nDecompressing Linux... ");
-	decompress(input_data, input_len, NULL, NULL, output_data, NULL, error);
+	__decompress(input_data, input_len, NULL, NULL, output_data, 0,
+			NULL, error);
 	puts("done.\nBooting the kernel.\n");
 }
diff --git a/arch/mips/boot/compressed/decompress.c b/arch/mips/boot/compressed/decompress.c
index d498a1f9bcc..49ddd6367d3 100644
--- a/arch/mips/boot/compressed/decompress.c
+++ b/arch/mips/boot/compressed/decompress.c
@@ -103,8 +103,8 @@ void decompress_kernel(unsigned long boot_heap_start)
 	puts("\n");
 
 	/* Decompress the kernel with according algorithm */
-	decompress((char *)zimage_start, zimage_size, 0, 0,
-		   (void *)VMLINUX_LOAD_ADDRESS_ULL, 0, error);
+	__decompress((char *)zimage_start, zimage_size, 0, 0,
+		   (void *)VMLINUX_LOAD_ADDRESS_ULL, 0, 0, error);
 
 	/* FIXME: should we flush cache here? */
 	puts("Now, booting the kernel...\n");
diff --git a/arch/s390/boot/compressed/misc.c b/arch/s390/boot/compressed/misc.c
index 05ab8824925..5d9da5c35e1 100644
--- a/arch/s390/boot/compressed/misc.c
+++ b/arch/s390/boot/compressed/misc.c
@@ -167,7 +167,7 @@ unsigned long decompress_kernel(void)
 	free_mem_end_ptr = free_mem_ptr + HEAP_SIZE;
 
 	puts("Uncompressing Linux... ");
-	decompress(input_data, input_len, NULL, NULL, output, NULL, error);
+	__decompress(input_data, input_len, NULL, NULL, output, 0, NULL, error);
 	puts("Ok, booting the kernel.\n");
 	return (unsigned long) output;
 }
diff --git a/arch/sh/boot/compressed/misc.c b/arch/sh/boot/compressed/misc.c
index 95470a472d2..208a9753ab3 100644
--- a/arch/sh/boot/compressed/misc.c
+++ b/arch/sh/boot/compressed/misc.c
@@ -132,7 +132,7 @@ void decompress_kernel(void)
 
 	puts("Uncompressing Linux... ");
 	cache_control(CACHE_ENABLE);
-	decompress(input_data, input_len, NULL, NULL, output, NULL, error);
+	__decompress(input_data, input_len, NULL, NULL, output, 0, NULL, error);
 	cache_control(CACHE_DISABLE);
 	puts("Ok, booting the kernel.\n");
 }
diff --git a/arch/unicore32/boot/compressed/misc.c b/arch/unicore32/boot/compressed/misc.c
index 176d5bda355..5c65dfee278 100644
--- a/arch/unicore32/boot/compressed/misc.c
+++ b/arch/unicore32/boot/compressed/misc.c
@@ -119,8 +119,8 @@ unsigned long decompress_kernel(unsigned long output_start,
 	output_ptr = get_unaligned_le32(tmp);
 
 	arch_decomp_puts("Uncompressing Linux...");
-	decompress(input_data, input_data_end - input_data, NULL, NULL,
-			output_data, NULL, error);
+	__decompress(input_data, input_data_end - input_data, NULL, NULL,
+			output_data, 0, NULL, error);
 	arch_decomp_puts(" done, booting the kernel.\n");
 	return output_ptr;
 }
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 268cabf6efe..a667d0fc056 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -65,6 +65,7 @@ config X86
 	select HAVE_KERNEL_LZMA
 	select HAVE_KERNEL_XZ
 	select HAVE_KERNEL_LZO
+	select HAVE_KERNEL_LZ4
 	select HAVE_HW_BREAKPOINT
 	select HAVE_MIXED_BREAKPOINTS_REGS
 	select PERF_EVENTS
diff --git a/arch/x86/boot/compressed/Makefile b/arch/x86/boot/compressed/Makefile
index b5b1998e1bc..33ff93cad5e 100644
--- a/arch/x86/boot/compressed/Makefile
+++ b/arch/x86/boot/compressed/Makefile
@@ -4,7 +4,8 @@
 # create a compressed vmlinux image from the original vmlinux
 #
 
-targets := vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 vmlinux.bin.lzma vmlinux.bin.xz vmlinux.bin.lzo
+targets := vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 vmlinux.bin.lzma \
+	vmlinux.bin.xz vmlinux.bin.lzo vmlinux.bin.lz4
 KASAN_SANITIZE := n
 
 KBUILD_CFLAGS := -m$(BITS) -D__KERNEL__ $(LINUX_INCLUDE) -O2
@@ -77,12 +78,15 @@ $(obj)/vmlinux.bin.xz: $(vmlinux.bin.all-y) FORCE
 	$(call if_changed,xzkern)
 $(obj)/vmlinux.bin.lzo: $(vmlinux.bin.all-y) FORCE
 	$(call if_changed,lzo)
+$(obj)/vmlinux.bin.lz4: $(vmlinux.bin.all-y) FORCE
+	$(call if_changed,lz4)
 
 suffix-$(CONFIG_KERNEL_GZIP)	:= gz
 suffix-$(CONFIG_KERNEL_BZIP2)	:= bz2
 suffix-$(CONFIG_KERNEL_LZMA)	:= lzma
 suffix-$(CONFIG_KERNEL_XZ)	:= xz
 suffix-$(CONFIG_KERNEL_LZO) 	:= lzo
+suffix-$(CONFIG_KERNEL_LZ4) 	:= lz4
 
 quiet_cmd_mkpiggy = MKPIGGY $@
       cmd_mkpiggy = $(obj)/mkpiggy $< > $@ || ( rm -f $@ ; false )
diff --git a/arch/x86/boot/compressed/misc.c b/arch/x86/boot/compressed/misc.c
index 7cb56c6ca35..9e83e337216 100644
--- a/arch/x86/boot/compressed/misc.c
+++ b/arch/x86/boot/compressed/misc.c
@@ -145,6 +145,10 @@ static int lines, cols;
 #include "../../../../lib/decompress_unlzo.c"
 #endif
 
+#ifdef CONFIG_KERNEL_LZ4
+#include "../../../../lib/decompress_unlz4.c"
+#endif
+
 static void scroll(void)
 {
 	int i;
@@ -359,7 +363,8 @@ asmlinkage void decompress_kernel(void *rmode, memptr heap,
 #endif
 
 	debug_putstr("\nDecompressing Linux... ");
-	decompress(input_data, input_len, NULL, NULL, output, NULL, error);
+	__decompress(input_data, input_len, NULL, NULL, output, output_len,
+			NULL, error);
 	parse_elf(output);
 	debug_putstr("done.\nBooting the kernel.\n");
 	return;
diff --git a/crypto/Kconfig b/crypto/Kconfig
index fa7e2a8cc60..5e3fb98d83b 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -1414,6 +1414,31 @@ config CRYPTO_842
 	help
 	  This is the 842 algorithm.
 
+config CRYPTO_842
+	tristate "842 compression algorithm"
+	depends on CRYPTO_DEV_NX_COMPRESS
+	# 842 uses lzo if the hardware becomes unavailable
+	select LZO_COMPRESS
+	select LZO_DECOMPRESS
+	help
+	  This is the 842 algorithm.
+
+config CRYPTO_LZ4
+	tristate "LZ4 compression algorithm"
+	select CRYPTO_ALGAPI
+	select LZ4_COMPRESS
+	select LZ4_DECOMPRESS
+	help
+	  This is the LZ4 algorithm.
+
+config CRYPTO_LZ4HC
+	tristate "LZ4HC compression algorithm"
+	select CRYPTO_ALGAPI
+	select LZ4HC_COMPRESS
+	select LZ4_DECOMPRESS
+	help
+	  This is the LZ4 high compression mode algorithm.
+
 comment "Random Number Generation"
 
 config CRYPTO_ANSI_CPRNG
diff --git a/crypto/Makefile b/crypto/Makefile
index f4c1ff4fa4f..38aab20905e 100644
--- a/crypto/Makefile
+++ b/crypto/Makefile
@@ -92,6 +92,8 @@ obj-$(CONFIG_CRYPTO_CRC32C) += crc32c.o
 obj-$(CONFIG_CRYPTO_CRC32) += crc32.o
 obj-$(CONFIG_CRYPTO_AUTHENC) += authenc.o authencesn.o
 obj-$(CONFIG_CRYPTO_LZO) += lzo.o
+obj-$(CONFIG_CRYPTO_LZ4) += lz4.o
+obj-$(CONFIG_CRYPTO_LZ4HC) += lz4hc.o
 obj-$(CONFIG_CRYPTO_842) += 842.o
 obj-$(CONFIG_CRYPTO_RNG2) += rng.o
 obj-$(CONFIG_CRYPTO_RNG2) += krng.o
diff --git a/crypto/lz4.c b/crypto/lz4.c
new file mode 100644
index 00000000000..34d072b72a7
--- /dev/null
+++ b/crypto/lz4.c
@@ -0,0 +1,106 @@
+/*
+ * Cryptographic API.
+ *
+ * Copyright (c) 2013 Chanho Min <chanho.min@lge.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/crypto.h>
+#include <linux/vmalloc.h>
+#include <linux/lz4.h>
+
+struct lz4_ctx {
+	void *lz4_comp_mem;
+};
+
+static int lz4_init(struct crypto_tfm *tfm)
+{
+	struct lz4_ctx *ctx = crypto_tfm_ctx(tfm);
+
+	ctx->lz4_comp_mem = vmalloc(LZ4_MEM_COMPRESS);
+	if (!ctx->lz4_comp_mem)
+		return -ENOMEM;
+
+	return 0;
+}
+
+static void lz4_exit(struct crypto_tfm *tfm)
+{
+	struct lz4_ctx *ctx = crypto_tfm_ctx(tfm);
+	vfree(ctx->lz4_comp_mem);
+}
+
+static int lz4_compress_crypto(struct crypto_tfm *tfm, const u8 *src,
+			    unsigned int slen, u8 *dst, unsigned int *dlen)
+{
+	struct lz4_ctx *ctx = crypto_tfm_ctx(tfm);
+	size_t tmp_len = *dlen;
+	int err;
+
+	err = lz4_compress(src, slen, dst, &tmp_len, ctx->lz4_comp_mem);
+
+	if (err < 0)
+		return -EINVAL;
+
+	*dlen = tmp_len;
+	return 0;
+}
+
+static int lz4_decompress_crypto(struct crypto_tfm *tfm, const u8 *src,
+			      unsigned int slen, u8 *dst, unsigned int *dlen)
+{
+	int err;
+	size_t tmp_len = *dlen;
+	size_t __slen = slen;
+
+	err = lz4_decompress_unknownoutputsize(src, __slen, dst, &tmp_len);
+	if (err < 0)
+		return -EINVAL;
+
+	*dlen = tmp_len;
+	return err;
+}
+
+static struct crypto_alg alg_lz4 = {
+	.cra_name		= "lz4",
+	.cra_flags		= CRYPTO_ALG_TYPE_COMPRESS,
+	.cra_ctxsize		= sizeof(struct lz4_ctx),
+	.cra_module		= THIS_MODULE,
+	.cra_list		= LIST_HEAD_INIT(alg_lz4.cra_list),
+	.cra_init		= lz4_init,
+	.cra_exit		= lz4_exit,
+	.cra_u			= { .compress = {
+	.coa_compress		= lz4_compress_crypto,
+	.coa_decompress		= lz4_decompress_crypto } }
+};
+
+static int __init lz4_mod_init(void)
+{
+	return crypto_register_alg(&alg_lz4);
+}
+
+static void __exit lz4_mod_fini(void)
+{
+	crypto_unregister_alg(&alg_lz4);
+}
+
+module_init(lz4_mod_init);
+module_exit(lz4_mod_fini);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("LZ4 Compression Algorithm");
diff --git a/crypto/lz4hc.c b/crypto/lz4hc.c
new file mode 100644
index 00000000000..9218b3fed5e
--- /dev/null
+++ b/crypto/lz4hc.c
@@ -0,0 +1,106 @@
+/*
+ * Cryptographic API.
+ *
+ * Copyright (c) 2013 Chanho Min <chanho.min@lge.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ */
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/crypto.h>
+#include <linux/vmalloc.h>
+#include <linux/lz4.h>
+
+struct lz4hc_ctx {
+	void *lz4hc_comp_mem;
+};
+
+static int lz4hc_init(struct crypto_tfm *tfm)
+{
+	struct lz4hc_ctx *ctx = crypto_tfm_ctx(tfm);
+
+	ctx->lz4hc_comp_mem = vmalloc(LZ4HC_MEM_COMPRESS);
+	if (!ctx->lz4hc_comp_mem)
+		return -ENOMEM;
+
+	return 0;
+}
+
+static void lz4hc_exit(struct crypto_tfm *tfm)
+{
+	struct lz4hc_ctx *ctx = crypto_tfm_ctx(tfm);
+
+	vfree(ctx->lz4hc_comp_mem);
+}
+
+static int lz4hc_compress_crypto(struct crypto_tfm *tfm, const u8 *src,
+			    unsigned int slen, u8 *dst, unsigned int *dlen)
+{
+	struct lz4hc_ctx *ctx = crypto_tfm_ctx(tfm);
+	size_t tmp_len = *dlen;
+	int err;
+
+	err = lz4hc_compress(src, slen, dst, &tmp_len, ctx->lz4hc_comp_mem);
+
+	if (err < 0)
+		return -EINVAL;
+
+	*dlen = tmp_len;
+	return 0;
+}
+
+static int lz4hc_decompress_crypto(struct crypto_tfm *tfm, const u8 *src,
+			      unsigned int slen, u8 *dst, unsigned int *dlen)
+{
+	int err;
+	size_t tmp_len = *dlen;
+	size_t __slen = slen;
+
+	err = lz4_decompress_unknownoutputsize(src, __slen, dst, &tmp_len);
+	if (err < 0)
+		return -EINVAL;
+
+	*dlen = tmp_len;
+	return err;
+}
+
+static struct crypto_alg alg_lz4hc = {
+	.cra_name		= "lz4hc",
+	.cra_flags		= CRYPTO_ALG_TYPE_COMPRESS,
+	.cra_ctxsize		= sizeof(struct lz4hc_ctx),
+	.cra_module		= THIS_MODULE,
+	.cra_list		= LIST_HEAD_INIT(alg_lz4hc.cra_list),
+	.cra_init		= lz4hc_init,
+	.cra_exit		= lz4hc_exit,
+	.cra_u			= { .compress = {
+	.coa_compress		= lz4hc_compress_crypto,
+	.coa_decompress		= lz4hc_decompress_crypto } }
+};
+
+static int __init lz4hc_mod_init(void)
+{
+	return crypto_register_alg(&alg_lz4hc);
+}
+
+static void __exit lz4hc_mod_fini(void)
+{
+	crypto_unregister_alg(&alg_lz4hc);
+}
+
+module_init(lz4hc_mod_init);
+module_exit(lz4hc_mod_fini);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("LZ4HC Compression Algorithm");
diff --git a/crypto/zlib.c b/crypto/zlib.c
index d9807883528..0eefa9d237a 100644
--- a/crypto/zlib.c
+++ b/crypto/zlib.c
@@ -168,7 +168,7 @@ static int zlib_compress_update(struct crypto_pcomp *tfm,
 	}
 
 	ret = req->avail_out - stream->avail_out;
-	pr_debug("avail_in %u, avail_out %u (consumed %u, produced %u)\n",
+	pr_debug("avail_in %lu, avail_out %lu (consumed %lu, produced %u)\n",
 		 stream->avail_in, stream->avail_out,
 		 req->avail_in - stream->avail_in, ret);
 	req->next_in = stream->next_in;
@@ -198,7 +198,7 @@ static int zlib_compress_final(struct crypto_pcomp *tfm,
 	}
 
 	ret = req->avail_out - stream->avail_out;
-	pr_debug("avail_in %u, avail_out %u (consumed %u, produced %u)\n",
+	pr_debug("avail_in %lu, avail_out %lu (consumed %lu, produced %u)\n",
 		 stream->avail_in, stream->avail_out,
 		 req->avail_in - stream->avail_in, ret);
 	req->next_in = stream->next_in;
@@ -283,7 +283,7 @@ static int zlib_decompress_update(struct crypto_pcomp *tfm,
 	}
 
 	ret = req->avail_out - stream->avail_out;
-	pr_debug("avail_in %u, avail_out %u (consumed %u, produced %u)\n",
+	pr_debug("avail_in %lu, avail_out %lu (consumed %lu, produced %u)\n",
 		 stream->avail_in, stream->avail_out,
 		 req->avail_in - stream->avail_in, ret);
 	req->next_in = stream->next_in;
@@ -331,7 +331,7 @@ static int zlib_decompress_final(struct crypto_pcomp *tfm,
 	}
 
 	ret = req->avail_out - stream->avail_out;
-	pr_debug("avail_in %u, avail_out %u (consumed %u, produced %u)\n",
+	pr_debug("avail_in %lu, avail_out %lu (consumed %lu, produced %u)\n",
 		 stream->avail_in, stream->avail_out,
 		 req->avail_in - stream->avail_in, ret);
 	req->next_in = stream->next_in;
diff --git a/drivers/cpufreq/cpufreq_stats.c b/drivers/cpufreq/cpufreq_stats.c
index d0c29bb6a82..c0b7dcaec92 100644
--- a/drivers/cpufreq/cpufreq_stats.c
+++ b/drivers/cpufreq/cpufreq_stats.c
@@ -420,19 +420,25 @@ error_out:
 	return ret;
 }
 
-static void cpufreq_stats_update_policy_cpu(struct cpufreq_policy *policy)
-{
-	struct cpufreq_stats *stat = per_cpu(cpufreq_stats_table,
-			policy->last_cpu);
+ static void cpufreq_stats_update_policy_cpu(struct cpufreq_policy *policy)
+ {
+	struct cpufreq_stats *last_stat, *new_stat;
+ 
+	last_stat = per_cpu(cpufreq_stats_table, policy->last_cpu);
+	if (!last_stat)
+ 		return;
+ 	pr_debug("Updating stats_table for new_cpu %u from last_cpu %u\n",
+ 			policy->cpu, policy->last_cpu);
+	new_stat = per_cpu(cpufreq_stats_table, policy->cpu);
+	if (new_stat) {
+		kfree(new_stat->time_in_state);
+		kfree(new_stat);
+	}
 
-	if (!stat)
-		return;
-	pr_debug("Updating stats_table for new_cpu %u from last_cpu %u\n",
-			policy->cpu, policy->last_cpu);
-	per_cpu(cpufreq_stats_table, policy->cpu) = per_cpu(cpufreq_stats_table,
-			policy->last_cpu);
-	per_cpu(cpufreq_stats_table, policy->last_cpu) = NULL;
-	stat->cpu = policy->cpu;
+ 	per_cpu(cpufreq_stats_table, policy->cpu) = per_cpu(cpufreq_stats_table,
+ 			policy->last_cpu);
+ 	per_cpu(cpufreq_stats_table, policy->last_cpu) = NULL;
+	last_stat->cpu = policy->cpu;
 }
 
 static void cpufreq_powerstats_create(unsigned int cpu,
diff --git a/fs/isofs/compress.c b/fs/isofs/compress.c
index 592e5115a56..f311bf08401 100644
--- a/fs/isofs/compress.c
+++ b/fs/isofs/compress.c
@@ -158,8 +158,8 @@ static loff_t zisofs_uncompress_block(struct inode *inode, loff_t block_start,
 					       "zisofs: zisofs_inflate returned"
 					       " %d, inode = %lu,"
 					       " page idx = %d, bh idx = %d,"
-					       " avail_in = %d,"
-					       " avail_out = %d\n",
+					       " avail_in = %ld,"
+					       " avail_out = %ld\n",
 					       zerr, inode->i_ino, curpage,
 					       curbh, stream.avail_in,
 					       stream.avail_out);
diff --git a/fs/jffs2/compr_zlib.c b/fs/jffs2/compr_zlib.c
index 0b9a1e44e83..5698dae5d92 100644
--- a/fs/jffs2/compr_zlib.c
+++ b/fs/jffs2/compr_zlib.c
@@ -94,11 +94,12 @@ static int jffs2_zlib_compress(unsigned char *data_in,
 
 	while (def_strm.total_out < *dstlen - STREAM_END_SPACE && def_strm.total_in < *sourcelen) {
 		def_strm.avail_out = *dstlen - (def_strm.total_out + STREAM_END_SPACE);
-		def_strm.avail_in = min((unsigned)(*sourcelen-def_strm.total_in), def_strm.avail_out);
-		jffs2_dbg(1, "calling deflate with avail_in %d, avail_out %d\n",
+		def_strm.avail_in = min_t(unsigned long,
+			(*sourcelen-def_strm.total_in), def_strm.avail_out);
+		jffs2_dbg(1, "calling deflate with avail_in %ld, avail_out %ld\n",
 			  def_strm.avail_in, def_strm.avail_out);
 		ret = zlib_deflate(&def_strm, Z_PARTIAL_FLUSH);
-		jffs2_dbg(1, "deflate returned with avail_in %d, avail_out %d, total_in %ld, total_out %ld\n",
+		jffs2_dbg(1, "deflate returned with avail_in %ld, avail_out %ld, total_in %ld, total_out %ld\n",
 			  def_strm.avail_in, def_strm.avail_out,
 			  def_strm.total_in, def_strm.total_out);
 		if (ret != Z_OK) {
diff --git a/include/linux/decompress/bunzip2.h b/include/linux/decompress/bunzip2.h
index 115272137a9..4d683df898e 100644
--- a/include/linux/decompress/bunzip2.h
+++ b/include/linux/decompress/bunzip2.h
@@ -1,10 +1,10 @@
 #ifndef DECOMPRESS_BUNZIP2_H
 #define DECOMPRESS_BUNZIP2_H
 
-int bunzip2(unsigned char *inbuf, int len,
-	    int(*fill)(void*, unsigned int),
-	    int(*flush)(void*, unsigned int),
+int bunzip2(unsigned char *inbuf, long len,
+	    long (*fill)(void*, unsigned long),
+	    long (*flush)(void*, unsigned long),
 	    unsigned char *output,
-	    int *pos,
+	    long *pos,
 	    void(*error)(char *x));
 #endif
diff --git a/include/linux/decompress/generic.h b/include/linux/decompress/generic.h
index 0c7111a55a1..1fcfd64b507 100644
--- a/include/linux/decompress/generic.h
+++ b/include/linux/decompress/generic.h
@@ -1,11 +1,11 @@
 #ifndef DECOMPRESS_GENERIC_H
 #define DECOMPRESS_GENERIC_H
 
-typedef int (*decompress_fn) (unsigned char *inbuf, int len,
-			      int(*fill)(void*, unsigned int),
-			      int(*flush)(void*, unsigned int),
+typedef int (*decompress_fn) (unsigned char *inbuf, long len,
+			      long (*fill)(void*, unsigned long),
+			      long (*flush)(void*, unsigned long),
 			      unsigned char *outbuf,
-			      int *posp,
+			      long *posp,
 			      void(*error)(char *x));
 
 /* inbuf   - input buffer
@@ -33,7 +33,7 @@ typedef int (*decompress_fn) (unsigned char *inbuf, int len,
 
 
 /* Utility routine to detect the decompression method */
-decompress_fn decompress_method(const unsigned char *inbuf, int len,
+decompress_fn decompress_method(const unsigned char *inbuf, long len,
 				const char **name);
 
 #endif
diff --git a/include/linux/decompress/inflate.h b/include/linux/decompress/inflate.h
index 8c0aef1ba5f..5dee4dd2eff 100644
--- a/include/linux/decompress/inflate.h
+++ b/include/linux/decompress/inflate.h
@@ -1,10 +1,10 @@
 #ifndef INFLATE_H
 #define INFLATE_H
 
-int gunzip(unsigned char *inbuf, int len,
-	   int(*fill)(void*, unsigned int),
-	   int(*flush)(void*, unsigned int),
+int gunzip(unsigned char *inbuf, long len,
+	   long (*fill)(void*, unsigned long),
+	   long (*flush)(void*, unsigned long),
 	   unsigned char *output,
-	   int *pos,
+	   long *pos,
 	   void(*error_fn)(char *x));
 #endif
diff --git a/include/linux/decompress/unlz4.h b/include/linux/decompress/unlz4.h
new file mode 100644
index 00000000000..3273c2f3649
--- /dev/null
+++ b/include/linux/decompress/unlz4.h
@@ -0,0 +1,10 @@
+#ifndef DECOMPRESS_UNLZ4_H
+#define DECOMPRESS_UNLZ4_H
+
+int unlz4(unsigned char *inbuf, long len,
+	long (*fill)(void*, unsigned long),
+	long (*flush)(void*, unsigned long),
+	unsigned char *output,
+	long *pos,
+	void(*error)(char *x));
+#endif
diff --git a/include/linux/decompress/unlzma.h b/include/linux/decompress/unlzma.h
index 7796538f1bf..8a891a19384 100644
--- a/include/linux/decompress/unlzma.h
+++ b/include/linux/decompress/unlzma.h
@@ -1,11 +1,11 @@
 #ifndef DECOMPRESS_UNLZMA_H
 #define DECOMPRESS_UNLZMA_H
 
-int unlzma(unsigned char *, int,
-	   int(*fill)(void*, unsigned int),
-	   int(*flush)(void*, unsigned int),
+int unlzma(unsigned char *, long,
+	   long (*fill)(void*, unsigned long),
+	   long (*flush)(void*, unsigned long),
 	   unsigned char *output,
-	   int *posp,
+	   long *posp,
 	   void(*error)(char *x)
 	);
 
diff --git a/include/linux/decompress/unlzo.h b/include/linux/decompress/unlzo.h
index 98722975251..af18f95d657 100644
--- a/include/linux/decompress/unlzo.h
+++ b/include/linux/decompress/unlzo.h
@@ -1,10 +1,10 @@
 #ifndef DECOMPRESS_UNLZO_H
 #define DECOMPRESS_UNLZO_H
 
-int unlzo(unsigned char *inbuf, int len,
-	int(*fill)(void*, unsigned int),
-	int(*flush)(void*, unsigned int),
+int unlzo(unsigned char *inbuf, long len,
+	long (*fill)(void*, unsigned long),
+	long (*flush)(void*, unsigned long),
 	unsigned char *output,
-	int *pos,
+	long *pos,
 	void(*error)(char *x));
 #endif
diff --git a/include/linux/decompress/unxz.h b/include/linux/decompress/unxz.h
index 41728fc6c8a..f764e2a7201 100644
--- a/include/linux/decompress/unxz.h
+++ b/include/linux/decompress/unxz.h
@@ -10,10 +10,10 @@
 #ifndef DECOMPRESS_UNXZ_H
 #define DECOMPRESS_UNXZ_H
 
-int unxz(unsigned char *in, int in_size,
-	 int (*fill)(void *dest, unsigned int size),
-	 int (*flush)(void *src, unsigned int size),
-	 unsigned char *out, int *in_used,
+int unxz(unsigned char *in, long in_size,
+	 long (*fill)(void *dest, unsigned long size),
+	 long (*flush)(void *src, unsigned long size),
+	 unsigned char *out, long *in_used,
 	 void (*error)(char *x));
 
 #endif
diff --git a/include/linux/kthread.h b/include/linux/kthread.h
index 7dcef331768..f52ec33a385 100644
--- a/include/linux/kthread.h
+++ b/include/linux/kthread.h
@@ -130,6 +130,18 @@ extern void __init_kthread_worker(struct kthread_worker *worker,
 		init_waitqueue_head(&(work)->done);			\
 	} while (0)
 
+/*
+ * Returns true when the work could not be queued at the moment.
+ * It happens when it is already pending in a worker list.
+ */
+static inline bool queuing_blocked(struct kthread_worker *worker,
+				   struct kthread_work *work)
+{
+	lockdep_assert_held(&worker->lock);
+
+	return !list_empty(&work->node);
+}
+
 int kthread_worker_fn(void *worker_ptr);
 
 bool queue_kthread_work(struct kthread_worker *worker,
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 5b7d2abe10d..34b8ff1ff48 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -149,10 +149,10 @@ extern void get_avenrun(unsigned long *loads, unsigned long offset, int shift);
 
 #define FSHIFT		11		/* nr of bits of precision */
 #define FIXED_1		(1<<FSHIFT)	/* 1.0 as fixed-point */
-#define LOAD_FREQ	(5*HZ+1)	/* 5 sec intervals */
-#define EXP_1		1884		/* 1/exp(5sec/1min) as fixed-point */
-#define EXP_5		2014		/* 1/exp(5sec/5min) */
-#define EXP_15		2037		/* 1/exp(5sec/15min) */
+#define LOAD_FREQ	(4*HZ+61)	/* 5 sec intervals */
+#define EXP_1		1896		/* 1/exp(5sec/1min) as fixed-point */
+#define EXP_5		2017		/* 1/exp(5sec/5min) */
+#define EXP_15		2038		/* 1/exp(5sec/15min) */
 
 #define CALC_LOAD(load,exp,n) \
 	load *= exp; \
diff --git a/include/linux/zlib.h b/include/linux/zlib.h
index 9c5a6b4de0a..9deeeafc6e1 100644
--- a/include/linux/zlib.h
+++ b/include/linux/zlib.h
@@ -83,11 +83,11 @@ struct internal_state;
 
 typedef struct z_stream_s {
     const Byte *next_in;   /* next input byte */
-    uInt     avail_in;  /* number of bytes available at next_in */
+	uLong avail_in;  /* number of bytes available at next_in */
     uLong    total_in;  /* total nb of input bytes read so far */
 
     Byte    *next_out;  /* next output byte should be put there */
-    uInt     avail_out; /* remaining free space at next_out */
+	uLong avail_out; /* remaining free space at next_out */
     uLong    total_out; /* total nb of bytes output so far */
 
     char     *msg;      /* last error message, NULL if no error */
diff --git a/init/Kconfig b/init/Kconfig
index 41e7cc70fe2..f7dbf7ed7d6 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -98,10 +98,13 @@ config HAVE_KERNEL_XZ
 config HAVE_KERNEL_LZO
 	bool
 
+config HAVE_KERNEL_LZ4
+	bool
+
 choice
 	prompt "Kernel compression mode"
 	default KERNEL_GZIP
-	depends on HAVE_KERNEL_GZIP || HAVE_KERNEL_BZIP2 || HAVE_KERNEL_LZMA || HAVE_KERNEL_XZ || HAVE_KERNEL_LZO
+	depends on HAVE_KERNEL_GZIP || HAVE_KERNEL_BZIP2 || HAVE_KERNEL_LZMA || HAVE_KERNEL_XZ || HAVE_KERNEL_LZO || HAVE_KERNEL_LZ4
 	help
 	  The linux kernel is a kind of self-extracting executable.
 	  Several compression algorithms are available, which differ
@@ -168,6 +171,18 @@ config KERNEL_LZO
 	  size is about 10% bigger than gzip; however its speed
 	  (both compression and decompression) is the fastest.
 
+config KERNEL_LZ4
+	bool "LZ4"
+	depends on HAVE_KERNEL_LZ4
+	help
+	  LZ4 is an LZ77-type compressor with a fixed, byte-oriented encoding.
+	  A preliminary version of LZ4 de/compression tool is available at
+	  <https://code.google.com/p/lz4/>.
+
+	  Its compression ratio is worse than LZO. The size of the kernel
+	  is about 8% bigger than LZO. But the decompression speed is
+	  faster than LZO.
+
 endchoice
 
 config DEFAULT_HOSTNAME
diff --git a/init/do_mounts_rd.c b/init/do_mounts_rd.c
index 6be2879cca6..a2946a19b3e 100644
--- a/init/do_mounts_rd.c
+++ b/init/do_mounts_rd.c
@@ -306,9 +306,9 @@ static int exit_code;
 static int decompress_error;
 static int crd_infd, crd_outfd;
 
-static int __init compr_fill(void *buf, unsigned int len)
+static long __init compr_fill(void *buf, unsigned long len)
 {
-	int r = sys_read(crd_infd, buf, len);
+	long r = sys_read(crd_infd, buf, len);
 	if (r < 0)
 		printk(KERN_ERR "RAMDISK: error while reading compressed data");
 	else if (r == 0)
@@ -316,13 +316,13 @@ static int __init compr_fill(void *buf, unsigned int len)
 	return r;
 }
 
-static int __init compr_flush(void *window, unsigned int outcnt)
+static long __init compr_flush(void *window, unsigned long outcnt)
 {
-	int written = sys_write(crd_outfd, window, outcnt);
+	long written = sys_write(crd_outfd, window, outcnt);
 	if (written != outcnt) {
 		if (decompress_error == 0)
 			printk(KERN_ERR
-			       "RAMDISK: incomplete write (%d != %d)\n",
+			       "RAMDISK: incomplete write (%ld != %ld)\n",
 			       written, outcnt);
 		decompress_error = 1;
 		return -1;
diff --git a/init/initramfs.c b/init/initramfs.c
index 43ae0cc9df4..32daa9b1996 100644
--- a/init/initramfs.c
+++ b/init/initramfs.c
@@ -175,7 +175,7 @@ static __initdata enum state {
 } state, next_state;
 
 static __initdata char *victim;
-static __initdata unsigned count;
+static unsigned long count __initdata;
 static __initdata loff_t this_header, next_header;
 
 static inline void __init eat(unsigned n)
@@ -187,7 +187,7 @@ static inline void __init eat(unsigned n)
 
 static __initdata char *vcollected;
 static __initdata char *collected;
-static __initdata int remains;
+static long remains __initdata;
 static __initdata char *collect;
 
 static void __init read_into(char *buf, unsigned size, enum state next)
@@ -214,7 +214,7 @@ static int __init do_start(void)
 
 static int __init do_collect(void)
 {
-	unsigned n = remains;
+	unsigned long n = remains;
 	if (count < n)
 		n = count;
 	memcpy(collect, victim, n);
@@ -385,7 +385,7 @@ static __initdata int (*actions[])(void) = {
 	[Reset]		= do_reset,
 };
 
-static int __init write_buffer(char *buf, unsigned len)
+static long __init write_buffer(char *buf, unsigned long len)
 {
 	count = len;
 	victim = buf;
@@ -395,11 +395,11 @@ static int __init write_buffer(char *buf, unsigned len)
 	return len - count;
 }
 
-static int __init flush_buffer(void *bufv, unsigned len)
+static long __init flush_buffer(void *bufv, unsigned long len)
 {
 	char *buf = (char *) bufv;
-	int written;
-	int origLen = len;
+	long written;
+	long origLen = len;
 	if (message)
 		return -1;
 	while ((written = write_buffer(buf, len)) < len && !message) {
@@ -418,13 +418,13 @@ static int __init flush_buffer(void *bufv, unsigned len)
 	return origLen;
 }
 
-static unsigned my_inptr;   /* index of next byte to be processed in inbuf */
+static unsigned long my_inptr; /* index of next byte to be processed in inbuf */
 
 #include <linux/decompress/generic.h>
 
-static char * __init unpack_to_rootfs(char *buf, unsigned len)
+static char * __init unpack_to_rootfs(char *buf, unsigned long len)
 {
-	int written, res;
+	long written;
 	decompress_fn decompress;
 	const char *compress_name;
 	static __initdata char msg_buf[64];
@@ -457,7 +457,7 @@ static char * __init unpack_to_rootfs(char *buf, unsigned len)
 		this_header = 0;
 		decompress = decompress_method(buf, len, &compress_name);
 		if (decompress) {
-			res = decompress(buf, len, NULL, flush_buffer, NULL,
+			int res = decompress(buf, len, NULL, flush_buffer, NULL,
 				   &my_inptr, error);
 			if (res)
 				error("decompressor failed");
diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c
index a4f5988b5e9..ed7d68dfea6 100644
--- a/kernel/time/clocksource.c
+++ b/kernel/time/clocksource.c
@@ -291,7 +291,7 @@ static void clocksource_watchdog(unsigned long data)
 			continue;
 
 		/* Check the deviation from the watchdog clocksource. */
-		if ((abs(cs_nsec - wd_nsec) > WATCHDOG_THRESHOLD)) {
+		if ((abs64(cs_nsec - wd_nsec) > WATCHDOG_THRESHOLD)) {
 			clocksource_unstable(cs, cs_nsec - wd_nsec);
 			continue;
 		}
diff --git a/lib/Kconfig b/lib/Kconfig
index 523bf22deeb..de6699a55e9 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -222,6 +222,10 @@ config DECOMPRESS_LZO
 	select LZO_DECOMPRESS
 	tristate
 
+config DECOMPRESS_LZ4
+	select LZ4_DECOMPRESS
+	tristate
+
 #
 # Generic allocator support is selected if needed
 #
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 04ca2dc38df..dc68c216a0c 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -797,7 +797,7 @@ config HAVE_DEBUG_BUGVERBOSE
 config DEBUG_BUGVERBOSE
 	bool "Verbose BUG() reporting (adds 70K)" if DEBUG_KERNEL && EXPERT
 	depends on BUG && (GENERIC_BUG || HAVE_DEBUG_BUGVERBOSE)
-	default y
+	default n
 	help
 	  Say Y here to make BUG() panics output the file name and line number
 	  of the BUG call as well as the EIP and oops trace.  This aids
diff --git a/lib/Makefile b/lib/Makefile
index e08387f87ee..a2a9a837b30 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -83,6 +83,7 @@ lib-$(CONFIG_DECOMPRESS_BZIP2) += decompress_bunzip2.o
 lib-$(CONFIG_DECOMPRESS_LZMA) += decompress_unlzma.o
 lib-$(CONFIG_DECOMPRESS_XZ) += decompress_unxz.o
 lib-$(CONFIG_DECOMPRESS_LZO) += decompress_unlzo.o
+lib-$(CONFIG_DECOMPRESS_LZ4) += decompress_unlz4.o
 
 obj-$(CONFIG_TEXTSEARCH) += textsearch.o
 obj-$(CONFIG_TEXTSEARCH_KMP) += ts_kmp.o
diff --git a/lib/decompress.c b/lib/decompress.c
index f8fdedaf7b3..ebd65ef7039 100644
--- a/lib/decompress.c
+++ b/lib/decompress.c
@@ -11,6 +11,7 @@
 #include <linux/decompress/unxz.h>
 #include <linux/decompress/inflate.h>
 #include <linux/decompress/unlzo.h>
+#include <linux/decompress/unlz4.h>
 
 #include <linux/types.h>
 #include <linux/string.h>
@@ -31,6 +32,9 @@
 #ifndef CONFIG_DECOMPRESS_LZO
 # define unlzo NULL
 #endif
+#ifndef CONFIG_DECOMPRESS_LZ4
+# define unlz4 NULL
+#endif
 
 struct compress_format {
 	unsigned char magic[2];
@@ -39,22 +43,26 @@ struct compress_format {
 };
 
 static const struct compress_format compressed_formats[] __initconst = {
-	{ {037, 0213}, "gzip", gunzip },
-	{ {037, 0236}, "gzip", gunzip },
+	{ {0x1f, 0x8b}, "gzip", gunzip },
+	{ {0x1f, 0x9e}, "gzip", gunzip },
 	{ {0x42, 0x5a}, "bzip2", bunzip2 },
 	{ {0x5d, 0x00}, "lzma", unlzma },
 	{ {0xfd, 0x37}, "xz", unxz },
 	{ {0x89, 0x4c}, "lzo", unlzo },
+	{ {0x02, 0x21}, "lz4", unlz4 },
 	{ {0, 0}, NULL, NULL }
 };
 
-decompress_fn __init decompress_method(const unsigned char *inbuf, int len,
+decompress_fn __init decompress_method(const unsigned char *inbuf, long len,
 				const char **name)
 {
 	const struct compress_format *cf;
 
-	if (len < 2)
+	if (len < 2) {
+		if (name)
+			*name = NULL;
 		return NULL;	/* Need at least this much... */
+	}
 
 	for (cf = compressed_formats; cf->name; cf++) {
 		if (!memcmp(inbuf, cf->magic, 2))
diff --git a/lib/decompress_bunzip2.c b/lib/decompress_bunzip2.c
index f504027d66a..0234361b24b 100644
--- a/lib/decompress_bunzip2.c
+++ b/lib/decompress_bunzip2.c
@@ -92,8 +92,8 @@ struct bunzip_data {
 	/* State for interrupting output loop */
 	int writeCopies, writePos, writeRunCountdown, writeCount, writeCurrent;
 	/* I/O tracking data (file handles, buffers, positions, etc.) */
-	int (*fill)(void*, unsigned int);
-	int inbufCount, inbufPos /*, outbufPos*/;
+	long (*fill)(void*, unsigned long);
+	long inbufCount, inbufPos /*, outbufPos*/;
 	unsigned char *inbuf /*,*outbuf*/;
 	unsigned int inbufBitCount, inbufBits;
 	/* The CRC values stored in the block header and calculated from the
@@ -617,7 +617,7 @@ decode_next_byte:
 	goto decode_next_byte;
 }
 
-static int INIT nofill(void *buf, unsigned int len)
+static long INIT nofill(void *buf, unsigned long len)
 {
 	return -1;
 }
@@ -625,8 +625,8 @@ static int INIT nofill(void *buf, unsigned int len)
 /* Allocate the structure, read file header.  If in_fd ==-1, inbuf must contain
    a complete bunzip file (len bytes long).  If in_fd!=-1, inbuf and len are
    ignored, and data is read from file handle into temporary buffer. */
-static int INIT start_bunzip(struct bunzip_data **bdp, void *inbuf, int len,
-			     int (*fill)(void*, unsigned int))
+static int INIT start_bunzip(struct bunzip_data **bdp, void *inbuf, long len,
+			     long (*fill)(void*, unsigned long))
 {
 	struct bunzip_data *bd;
 	unsigned int i, j, c;
@@ -675,11 +675,11 @@ static int INIT start_bunzip(struct bunzip_data **bdp, void *inbuf, int len,
 
 /* Example usage: decompress src_fd to dst_fd.  (Stops at end of bzip2 data,
    not end of file.) */
-STATIC int INIT bunzip2(unsigned char *buf, int len,
-			int(*fill)(void*, unsigned int),
-			int(*flush)(void*, unsigned int),
+STATIC int INIT bunzip2(unsigned char *buf, long len,
+			long (*fill)(void*, unsigned long),
+			long (*flush)(void*, unsigned long),
 			unsigned char *outbuf,
-			int *pos,
+			long *pos,
 			void(*error)(char *x))
 {
 	struct bunzip_data *bd;
@@ -743,12 +743,12 @@ exit_0:
 }
 
 #ifdef PREBOOT
-STATIC int INIT decompress(unsigned char *buf, int len,
-			int(*fill)(void*, unsigned int),
-			int(*flush)(void*, unsigned int),
-			unsigned char *outbuf,
-			int *pos,
-			void(*error)(char *x))
+STATIC int INIT __decompress(unsigned char *buf, long len,
+			long (*fill)(void*, unsigned long),
+			long (*flush)(void*, unsigned long),
+			unsigned char *outbuf, long olen,
+			long *pos,
+			void (*error)(char *x))
 {
 	return bunzip2(buf, len - 4, fill, flush, outbuf, pos, error);
 }
diff --git a/lib/decompress_inflate.c b/lib/decompress_inflate.c
index d619b28c456..a9ce0823036 100644
--- a/lib/decompress_inflate.c
+++ b/lib/decompress_inflate.c
@@ -1,4 +1,5 @@
 #ifdef STATIC
+#define PREBOOT
 /* Pre-boot environment: included */
 
 /* prevent inclusion of _LINUX_KERNEL_H in pre-boot environment: lots
@@ -26,29 +27,29 @@
 
 #define GZIP_IOBUF_SIZE (16*1024)
 
-static int INIT nofill(void *buffer, unsigned int len)
+static long INIT nofill(void *buffer, unsigned long len)
 {
 	return -1;
 }
 
 /* Included from initramfs et al code */
-STATIC int INIT gunzip(unsigned char *buf, int len,
-		       int(*fill)(void*, unsigned int),
-		       int(*flush)(void*, unsigned int),
-		       unsigned char *out_buf,
-		       int *pos,
+STATIC int INIT __gunzip(unsigned char *buf, long len,
+		       long (*fill)(void*, unsigned long),
+		       long (*flush)(void*, unsigned long),
+		       unsigned char *out_buf, long out_len,
+		       long *pos,
 		       void(*error)(char *x)) {
 	u8 *zbuf;
 	struct z_stream_s *strm;
 	int rc;
-	size_t out_len;
 
 	rc = -1;
 	if (flush) {
 		out_len = 0x8000; /* 32 K */
 		out_buf = malloc(out_len);
 	} else {
-		out_len = ((size_t)~0) - (size_t)out_buf; /* no limit */
+		if (!out_len)
+			out_len = ((size_t)~0) - (size_t)out_buf; /* no limit */
 	}
 	if (!out_buf) {
 		error("Out of memory while allocating output buffer");
@@ -141,7 +142,7 @@ STATIC int INIT gunzip(unsigned char *buf, int len,
 
 		/* Write any data generated */
 		if (flush && strm->next_out > out_buf) {
-			int l = strm->next_out - out_buf;
+			long l = strm->next_out - out_buf;
 			if (l != flush(out_buf, l)) {
 				rc = -1;
 				error("write error");
@@ -180,4 +181,24 @@ gunzip_nomem1:
 	return rc; /* returns Z_OK (0) if successful */
 }
 
-#define decompress gunzip
+#ifndef PREBOOT
+STATIC int INIT gunzip(unsigned char *buf, long len,
+		       long (*fill)(void*, unsigned long),
+		       long (*flush)(void*, unsigned long),
+		       unsigned char *out_buf,
+		       long *pos,
+		       void (*error)(char *x))
+{
+	return __gunzip(buf, len, fill, flush, out_buf, 0, pos, error);
+}
+#else
+STATIC int INIT __decompress(unsigned char *buf, long len,
+			   long (*fill)(void*, unsigned long),
+			   long (*flush)(void*, unsigned long),
+			   unsigned char *out_buf, long out_len,
+			   long *pos,
+			   void (*error)(char *x))
+{
+	return __gunzip(buf, len, fill, flush, out_buf, out_len, pos, error);
+}
+#endif
diff --git a/lib/decompress_unlz4.c b/lib/decompress_unlz4.c
new file mode 100644
index 00000000000..036fc882cd7
--- /dev/null
+++ b/lib/decompress_unlz4.c
@@ -0,0 +1,209 @@
+/*
+ * Wrapper for decompressing LZ4-compressed kernel, initramfs, and initrd
+ *
+ * Copyright (C) 2013, LG Electronics, Kyungsik Lee <kyungsik.lee@lge.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifdef STATIC
+#define PREBOOT
+#include "lz4/lz4_decompress.c"
+#else
+#include <linux/decompress/unlz4.h>
+#endif
+#include <linux/types.h>
+#include <linux/lz4.h>
+#include <linux/decompress/mm.h>
+#include <linux/compiler.h>
+
+#include <asm/unaligned.h>
+
+/*
+ * Note: Uncompressed chunk size is used in the compressor side
+ * (userspace side for compression).
+ * It is hardcoded because there is not proper way to extract it
+ * from the binary stream which is generated by the preliminary
+ * version of LZ4 tool so far.
+ */
+#define LZ4_DEFAULT_UNCOMPRESSED_CHUNK_SIZE (8 << 20)
+#define ARCHIVE_MAGICNUMBER 0x184C2102
+
+STATIC inline int INIT unlz4(u8 *input, long in_len,
+				long (*fill)(void *, unsigned long),
+				long (*flush)(void *, unsigned long),
+				u8 *output, long *posp,
+				void (*error) (char *x))
+{
+	int ret = -1;
+	size_t chunksize = 0;
+	size_t uncomp_chunksize = LZ4_DEFAULT_UNCOMPRESSED_CHUNK_SIZE;
+	u8 *inp;
+	u8 *inp_start;
+	u8 *outp;
+	long size = in_len;
+#ifdef PREBOOT
+	size_t out_len = get_unaligned_le32(input + in_len);
+#endif
+	size_t dest_len;
+
+
+	if (output) {
+		outp = output;
+	} else if (!flush) {
+		error("NULL output pointer and no flush function provided");
+		goto exit_0;
+	} else {
+		outp = large_malloc(uncomp_chunksize);
+		if (!outp) {
+			error("Could not allocate output buffer");
+			goto exit_0;
+		}
+	}
+
+	if (input && fill) {
+		error("Both input pointer and fill function provided,");
+		goto exit_1;
+	} else if (input) {
+		inp = input;
+	} else if (!fill) {
+		error("NULL input pointer and missing fill function");
+		goto exit_1;
+	} else {
+		inp = large_malloc(lz4_compressbound(uncomp_chunksize));
+		if (!inp) {
+			error("Could not allocate input buffer");
+			goto exit_1;
+		}
+	}
+	inp_start = inp;
+
+	if (posp)
+		*posp = 0;
+
+	if (fill) {
+		size = fill(inp, 4);
+		if (size < 4) {
+			error("data corrupted");
+			goto exit_2;
+		}
+	}
+
+	chunksize = get_unaligned_le32(inp);
+	if (chunksize == ARCHIVE_MAGICNUMBER) {
+		if (!fill) {
+			inp += 4;
+			size -= 4;
+		}
+	} else {
+		error("invalid header");
+		goto exit_2;
+	}
+
+	if (posp)
+		*posp += 4;
+
+	for (;;) {
+
+		if (fill) {
+			size = fill(inp, 4);
+			if (size == 0)
+				break;
+			if (size < 4) {
+				error("data corrupted");
+				goto exit_2;
+			}
+		}
+
+		chunksize = get_unaligned_le32(inp);
+		if (chunksize == ARCHIVE_MAGICNUMBER) {
+			if (!fill) {
+				inp += 4;
+				size -= 4;
+			}
+			if (posp)
+				*posp += 4;
+			continue;
+		}
+
+
+		if (posp)
+			*posp += 4;
+
+		if (!fill) {
+			inp += 4;
+			size -= 4;
+		} else {
+			if (chunksize > lz4_compressbound(uncomp_chunksize)) {
+				error("chunk length is longer than allocated");
+				goto exit_2;
+			}
+			size = fill(inp, chunksize);
+			if (size < chunksize) {
+				error("data corrupted");
+				goto exit_2;
+			}
+		}
+#ifdef PREBOOT
+		if (out_len >= uncomp_chunksize) {
+			dest_len = uncomp_chunksize;
+			out_len -= dest_len;
+		} else
+			dest_len = out_len;
+		ret = lz4_decompress(inp, &chunksize, outp, dest_len);
+#else
+		dest_len = uncomp_chunksize;
+		ret = lz4_decompress_unknownoutputsize(inp, chunksize, outp,
+				&dest_len);
+#endif
+		if (ret < 0) {
+			error("Decoding failed");
+			goto exit_2;
+		}
+
+		ret = -1;
+		if (flush && flush(outp, dest_len) != dest_len)
+			goto exit_2;
+		if (output)
+			outp += dest_len;
+		if (posp)
+			*posp += chunksize;
+
+		if (!fill) {
+			size -= chunksize;
+
+			if (size == 0)
+				break;
+			else if (size < 0) {
+				error("data corrupted");
+				goto exit_2;
+			}
+			inp += chunksize;
+		}
+	}
+
+	ret = 0;
+exit_2:
+	if (!input)
+		large_free(inp_start);
+exit_1:
+	if (!output)
+		large_free(outp);
+exit_0:
+	return ret;
+}
+
+#ifdef PREBOOT
+STATIC int INIT __decompress(unsigned char *buf, long in_len,
+			      long (*fill)(void*, unsigned long),
+			      long (*flush)(void*, unsigned long),
+			      unsigned char *output, long out_len,
+			      long *posp,
+			      void (*error)(char *x)
+	)
+{
+	return unlz4(buf, in_len - 4, fill, flush, output, posp, error);
+}
+#endif
diff --git a/lib/decompress_unlzma.c b/lib/decompress_unlzma.c
index 32adb73a903..decb64629c1 100644
--- a/lib/decompress_unlzma.c
+++ b/lib/decompress_unlzma.c
@@ -65,11 +65,11 @@ static long long INIT read_int(unsigned char *ptr, int size)
 #define LZMA_IOBUF_SIZE	0x10000
 
 struct rc {
-	int (*fill)(void*, unsigned int);
+	long (*fill)(void*, unsigned long);
 	uint8_t *ptr;
 	uint8_t *buffer;
 	uint8_t *buffer_end;
-	int buffer_size;
+	long buffer_size;
 	uint32_t code;
 	uint32_t range;
 	uint32_t bound;
@@ -82,7 +82,7 @@ struct rc {
 #define RC_MODEL_TOTAL_BITS 11
 
 
-static int INIT nofill(void *buffer, unsigned int len)
+static long INIT nofill(void *buffer, unsigned long len)
 {
 	return -1;
 }
@@ -99,8 +99,8 @@ static void INIT rc_read(struct rc *rc)
 
 /* Called once */
 static inline void INIT rc_init(struct rc *rc,
-				       int (*fill)(void*, unsigned int),
-				       char *buffer, int buffer_size)
+				       long (*fill)(void*, unsigned long),
+				       char *buffer, long buffer_size)
 {
 	if (fill)
 		rc->fill = fill;
@@ -280,7 +280,7 @@ struct writer {
 	size_t buffer_pos;
 	int bufsize;
 	size_t global_pos;
-	int(*flush)(void*, unsigned int);
+	long (*flush)(void*, unsigned long);
 	struct lzma_header *header;
 };
 
@@ -534,11 +534,11 @@ static inline int INIT process_bit1(struct writer *wr, struct rc *rc,
 
 
 
-STATIC inline int INIT unlzma(unsigned char *buf, int in_len,
-			      int(*fill)(void*, unsigned int),
-			      int(*flush)(void*, unsigned int),
+STATIC inline int INIT unlzma(unsigned char *buf, long in_len,
+			      long (*fill)(void*, unsigned long),
+			      long (*flush)(void*, unsigned long),
 			      unsigned char *output,
-			      int *posp,
+			      long *posp,
 			      void(*error)(char *x)
 	)
 {
@@ -667,13 +667,12 @@ exit_0:
 }
 
 #ifdef PREBOOT
-STATIC int INIT decompress(unsigned char *buf, int in_len,
-			      int(*fill)(void*, unsigned int),
-			      int(*flush)(void*, unsigned int),
-			      unsigned char *output,
-			      int *posp,
-			      void(*error)(char *x)
-	)
+STATIC int INIT __decompress(unsigned char *buf, long in_len,
+			      long (*fill)(void*, unsigned long),
+			      long (*flush)(void*, unsigned long),
+			      unsigned char *output, long out_len,
+			      long *posp,
+			      void (*error)(char *x))
 {
 	return unlzma(buf, in_len - 4, fill, flush, output, posp, error);
 }
diff --git a/lib/decompress_unlzo.c b/lib/decompress_unlzo.c
index 960183d4258..f4c158e3a02 100644
--- a/lib/decompress_unlzo.c
+++ b/lib/decompress_unlzo.c
@@ -31,6 +31,7 @@
  */
 
 #ifdef STATIC
+#define PREBOOT
 #include "lzo/lzo1x_decompress_safe.c"
 #else
 #include <linux/decompress/unlzo.h>
@@ -51,7 +52,7 @@ static const unsigned char lzop_magic[] = {
 #define HEADER_SIZE_MIN       (9 + 7     + 4 + 8     + 1       + 4)
 #define HEADER_SIZE_MAX       (9 + 7 + 1 + 8 + 8 + 4 + 1 + 255 + 4)
 
-STATIC inline int INIT parse_header(u8 *input, int *skip, int in_len)
+STATIC inline long INIT parse_header(u8 *input, long *skip, long in_len)
 {
 	int l;
 	u8 *parse = input;
@@ -108,14 +109,14 @@ STATIC inline int INIT parse_header(u8 *input, int *skip, int in_len)
 	return 1;
 }
 
-STATIC inline int INIT unlzo(u8 *input, int in_len,
-				int (*fill) (void *, unsigned int),
-				int (*flush) (void *, unsigned int),
-				u8 *output, int *posp,
+STATIC int INIT unlzo(u8 *input, long in_len,
+				long (*fill)(void *, unsigned long),
+				long (*flush)(void *, unsigned long),
+				u8 *output, long *posp,
 				void (*error) (char *x))
 {
 	u8 r = 0;
-	int skip = 0;
+	long skip = 0;
 	u32 src_len, dst_len;
 	size_t tmp;
 	u8 *in_buf, *in_buf_save, *out_buf;
@@ -287,4 +288,14 @@ exit:
 	return ret;
 }
 
-#define decompress unlzo
+#ifdef PREBOOT
+STATIC int INIT __decompress(unsigned char *buf, long len,
+			   long (*fill)(void*, unsigned long),
+			   long (*flush)(void*, unsigned long),
+			   unsigned char *out_buf, long olen,
+			   long *pos,
+			   void (*error)(char *x))
+{
+	return unlzo(buf, len, fill, flush, out_buf, pos, error);
+}
+#endif
diff --git a/lib/decompress_unxz.c b/lib/decompress_unxz.c
index 9f34eb56854..25d59a95bd6 100644
--- a/lib/decompress_unxz.c
+++ b/lib/decompress_unxz.c
@@ -248,10 +248,10 @@ void *memmove(void *dest, const void *src, size_t size)
  * both input and output buffers are available as a single chunk, i.e. when
  * fill() and flush() won't be used.
  */
-STATIC int INIT unxz(unsigned char *in, int in_size,
-		     int (*fill)(void *dest, unsigned int size),
-		     int (*flush)(void *src, unsigned int size),
-		     unsigned char *out, int *in_used,
+STATIC int INIT unxz(unsigned char *in, long in_size,
+		     long (*fill)(void *dest, unsigned long size),
+		     long (*flush)(void *src, unsigned long size),
+		     unsigned char *out, long *in_used,
 		     void (*error)(char *x))
 {
 	struct xz_buf b;
@@ -329,7 +329,7 @@ STATIC int INIT unxz(unsigned char *in, int in_size,
 				 * returned by xz_dec_run(), but probably
 				 * it's not too bad.
 				 */
-				if (flush(b.out, b.out_pos) != (int)b.out_pos)
+				if (flush(b.out, b.out_pos) != (long)b.out_pos)
 					ret = XZ_BUF_ERROR;
 
 				b.out_pos = 0;
@@ -394,4 +394,14 @@ error_alloc_state:
  * This macro is used by architecture-specific files to decompress
  * the kernel image.
  */
-#define decompress unxz
+#ifdef XZ_PREBOOT
+STATIC int INIT __decompress(unsigned char *buf, long len,
+			   long (*fill)(void*, unsigned long),
+			   long (*flush)(void*, unsigned long),
+			   unsigned char *out_buf, long olen,
+			   long *pos,
+			   void (*error)(char *x))
+{
+	return unxz(buf, len, fill, flush, out_buf, pos, error);
+}
+#endif
diff --git a/lib/lz4/lz4_decompress.c b/lib/lz4/lz4_decompress.c
index b16db3b9e62..6d940c72b5f 100644
--- a/lib/lz4/lz4_decompress.c
+++ b/lib/lz4/lz4_decompress.c
@@ -1,7 +1,7 @@
 /*
  * LZ4 Decompressor for Linux kernel
  *
- * Copyright (C) 2013 LG Electronics Co., Ltd. (http://www.lge.com/)
+ * Copyright (C) 2013, LG Electronics, Kyungsik Lee <kyungsik.lee@lge.com>
  *
  * Based on LZ4 implementation by Yann Collet.
  *
diff --git a/net/ipc_router/ipc_router_core.c b/net/ipc_router/ipc_router_core.c
index dcb4bab7cbc..61ebccebcad 100644
--- a/net/ipc_router/ipc_router_core.c
+++ b/net/ipc_router/ipc_router_core.c
@@ -1444,6 +1444,27 @@ static void msm_ipc_router_free_resume_tx_port(
 }
 
 /**
+ * msm_ipc_router_free_conn_info() - Free the local ports
+ * @rport_ptr: Pointer to the remote port.
+ *
+ * This function deletes all the local ports associated with a remote port
+ * and frees the memory allocated to each local port.
+ *
+ * Must be called with rport_ptr->rport_lock_lhb2 locked.
+ */
+static void msm_ipc_router_free_conn_info(
+	struct msm_ipc_router_remote_port *rport_ptr)
+{
+	struct ipc_router_conn_info *conn_info, *tmp_conn_info;
+
+	list_for_each_entry_safe(conn_info, tmp_conn_info,
+			&rport_ptr->conn_info_list, list) {
+		list_del(&conn_info->list);
+		kfree(conn_info);
+	}
+}
+
+/**
  * msm_ipc_router_lookup_resume_tx_port() - Lookup resume_tx port list
  * @rport_ptr: Remote port whose resume_tx port list needs to be looked.
  * @port_id: Port ID which needs to be looked from the list.
@@ -1560,6 +1581,7 @@ static void ipc_router_release_rport(struct kref *ref)
 
 	mutex_lock(&rport_ptr->rport_lock_lhb2);
 	msm_ipc_router_free_resume_tx_port(rport_ptr);
+	msm_ipc_router_free_conn_info(rport_ptr);
 	mutex_unlock(&rport_ptr->rport_lock_lhb2);
 	kfree(rport_ptr);
 }
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 1a65fbc7ab7..5c00c754d5b 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -327,6 +327,11 @@ cmd_lzo = (cat $(filter-out FORCE,$^) | \
 	lzop -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
 	(rm -f $@ ; false)
 
+quiet_cmd_lz4 = LZ4     $@
+cmd_lz4 = (cat $(filter-out FORCE,$^) | \
+	lz4c -l -c1 stdin stdout && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
+	(rm -f $@ ; false)
+
 # U-Boot mkimage
 # ---------------------------------------------------------------------------
 
diff --git a/usr/Kconfig b/usr/Kconfig
index 085872bb2bb..642f503d3e9 100644
--- a/usr/Kconfig
+++ b/usr/Kconfig
@@ -90,6 +90,15 @@ config RD_LZO
 	  Support loading of a LZO encoded initial ramdisk or cpio buffer
 	  If unsure, say N.
 
+config RD_LZ4
+	bool "Support initial ramdisks compressed using LZ4" if EXPERT
+	default !EXPERT
+	depends on BLK_DEV_INITRD
+	select DECOMPRESS_LZ4
+	help
+	  Support loading of a LZ4 encoded initial ramdisk or cpio buffer
+	  If unsure, say N.
+
 choice
 	prompt "Built-in initramfs compression mode" if INITRAMFS_SOURCE!=""
 	help