worker_thread: don't play with SIGCHLD and numa policy

worker_thread() inherits ignored SIGCHLD and numa_default_policy() from its
parent, kthreadd.  No need to setup this again.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index c9ab4293904ff2b047f45e21ff95f315eb7d41da..25cee1afe6fb9cf64e26bd79b90045ce2d503cae 100644 (file)
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -289,23 +289,11 @@ static int worker_thread(void *__cwq)
 {
        struct cpu_workqueue_struct *cwq = __cwq;
        DEFINE_WAIT(wait);
-       struct k_sigaction sa;
 
        if (!cwq->wq->freezeable)
                current->flags |= PF_NOFREEZE;
 
        set_user_nice(current, -5);
-       /*
-        * We inherited MPOL_INTERLEAVE from the booting kernel.
-        * Set MPOL_DEFAULT to insure node local allocations.
-        */
-       numa_default_policy();
-
-       /* SIG_IGN makes children autoreap: see do_notify_parent(). */
-       sa.sa.sa_handler = SIG_IGN;
-       sa.sa.sa_flags = 0;
-       siginitset(&sa.sa.sa_mask, sigmask(SIGCHLD));
-       do_sigaction(SIGCHLD, &sa, (struct k_sigaction *)0);
 
        for (;;) {
                prepare_to_wait(&cwq->more_work, &wait, TASK_INTERRUPTIBLE);