[PATCH] Software suspend and recalc sigpending bug fix

[Kirill Korotaev]

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@xxxxx>
Signed-Off-By: Alexey Kuznetsov <kuznet@xxxxxxxxxxxxx>
--- ./kernel/signal.c.freezesigrec	2005-05-10 16:10:40.000000000 +0400
+++ ./kernel/signal.c	2005-05-10 18:10:08.000000000 +0400
@@ -212,6 +212,7 @@ static inline int has_pending_signals(si
 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);