diff options
Diffstat (limited to 'kernel/sys.c')
| -rw-r--r-- | kernel/sys.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/kernel/sys.c b/kernel/sys.c index 60eb8d9dee4..1e63f33beb5 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -2405,6 +2405,26 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3, else return -EINVAL; break; + case PR_SET_TIMERSLACK_PID: + if (current->pid != (pid_t)arg3 && + !capable(CAP_SYS_NICE)) + return -EPERM; + rcu_read_lock(); + tsk = find_task_by_pid_ns((pid_t)arg3, &init_pid_ns); + if (tsk == NULL) { + rcu_read_unlock(); + return -EINVAL; + } + get_task_struct(tsk); + rcu_read_unlock(); + if (arg2 <= 0) + tsk->timer_slack_ns = + tsk->default_timer_slack_ns; + else + tsk->timer_slack_ns = arg2; + put_task_struct(tsk); + error = 0; + break; default: return -EINVAL; } |