do_sigaction: remove now unneeded recalc_sigpending()

With the recent changes, do_sigaction()->recalc_sigpending_and_wake() can
never clear TIF_SIGPENDING. Instead, it can set this flag and wake up the
thread without any reason. Harmless, but unneeded and wastes CPU.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Acked-by: Roland McGrath <roland@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
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 7929523810928d9aa405aa74cb2e390a6083491f..2f7736ff74188f0891c971b2151bc8da1af77b9e 100644 (file)
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -2335,7 +2335,6 @@ int do_sigaction(int sig, struct k_sigaction *act, struct k_sigaction *oact)
                        rm_from_queue_full(&mask, &t->signal->shared_pending);
                        do {
                                rm_from_queue_full(&mask, &t->pending);
-                               recalc_sigpending_and_wake(t);
                                t = next_thread(t);
                        } while (t != current);
                }