call_usermodehelper: no need to unblock signals

____call_usermodehelper() correctly calls flush_signal_handlers() to set
SIG_DFL, but sigemptyset(->blocked) and recalc_sigpending() are not
needed.

This kthread was forked by workqueue thread, all signals must be unblocked
and ignored, no pending signal is possible.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 0 insertions, 3 deletions

diff --git a/kernel/kmod.c b/kernel/kmod.c
index 6194ec2f737b..7efba6f8e3ec 100644
--- a/kernel/kmod.c
+++ b/kernel/kmod.c
@@ -134,11 +134,8 @@ static int ____call_usermodehelper(void *data)
         struct subprocess_info *sub_info = data;
         int retval;
 
-        /* Unblock all signals */
         spin_lock_irq(&current->sighand->siglock);
         flush_signal_handlers(current, 1);
-        sigemptyset(&current->blocked);
-        recalc_sigpending();
         spin_unlock_irq(&current->sighand->siglock);
 
         /* We can run anywhere, unlike our parent keventd(). */