depends on Eric's
kthread-dont-depend-on-work-queues-take-2.patch
worker_thread() inherits ignored SIGCHLD from its parent, kthreadd.
We can remove unneeded do_sigaction().
Signed-off-by: Oleg Nesterov <[email protected]>
--- OLD/kernel/workqueue.c~wt 2007-04-05 12:20:35.000000000 +0400
+++ OLD/kernel/workqueue.c 2007-04-13 11:21:43.000000000 +0400
@@ -289,7 +289,6 @@ 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;
@@ -300,12 +299,6 @@ static int worker_thread(void *__cwq)
*/
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 (;;) {
if (cwq->wq->freezeable)
try_to_freeze();
-
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