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do_sigaction: don't worry about signal_pending() 

do_sigaction() returns -ERESTARTNOINTR if signal_pending(). The comment says:

	* If there might be a fatal signal pending on multiple
	* threads, make sure we take it before changing the action.

I think this is not needed. We should only worry about SIGNAL_GROUP_EXIT case,
bit it implies a pending SIGKILL which can't be cleared by do_sigaction.

Kill this special case.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Acked-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Oleg Nesterov 2007-10-16 23:27:24 -07:00 committed by Linus Torvalds
parent 6db840fa78
commit 13fbcb7312
1 changed files with 0 additions and 9 deletions
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9
kernel/signal.c
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@ -2294,15 +2294,6 @@ int do_sigaction(int sig, struct k_sigaction *act, struct k_sigaction *oact)
k = &current->sighand->action[sig-1];
spin_lock_irq(&current->sighand->siglock);
if (signal_pending(current)) {
/*
* If there might be a fatal signal pending on multiple
* threads, make sure we take it before changing the action.
*/
spin_unlock_irq(&current->sighand->siglock);
return -ERESTARTNOINTR;
}
if (oact)
*oact = *k;