signals: collect_signal: remove the unneeded sigismember() check
collect_signal() checks sigismember(&list->signal, sig), this is not
needed. This "sig" was just found by next_signal(), so it must be valid.
We have a (completely broken) call to ->notifier in between, but it must
not play with sigpending->signal bits or unlock ->siglock.
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>
diff --git a/kernel/signal.c b/kernel/signal.c
index 6c0958e..c5b9aab 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -343,9 +343,6 @@
struct sigqueue *q, *first = NULL;
int still_pending = 0;
- if (unlikely(!sigismember(&list->signal, sig)))
- return 0;
-
/*
* Collect the siginfo appropriate to this signal. Check if
* there is another siginfo for the same signal.