Commit 4fea2838 authored Jun 23, 2005 by Kirill Korotaev Committed by Linus Torvalds Jun 23, 2005

[PATCH] Software suspend and recalc sigpending bug fix



This patch fixes recalc_sigpending() to work correctly with tasks which are
being freezed.

The problem is that freeze_processes() sets PF_FREEZE and TIF_SIGPENDING
flags on tasks, but recalc_sigpending() called from e.g.
sys_rt_sigtimedwait or any other kernel place will clear TIF_SIGPENDING due
to no pending signals queued and the tasks won't be freezed until it
recieves a real signal or freezed_processes() fail due to timeout.

Signed-Off-By: Kirill Korotaev <dev@sw.ru>
Signed-Off-By: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

parent af4d2ecb

kernel/signal.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -213,6 +213,7 @@ static inline int has_pending_signals(sigset_t signal, sigset_t blocked)
		fastcall void recalc_sigpending_tsk(struct task_struct *t)
		{
		if (t->signal->group_stop_count > 0 \|\|
		(t->flags & PF_FREEZE) \|\|
		PENDING(&t->pending, &t->blocked) \|\|
		PENDING(&t->signal->shared_pending, &t->blocked))
		set_tsk_thread_flag(t, TIF_SIGPENDING);

Admin message