um: don't restore current->blocked on error

If we fail to setup the signal stack frame then we don't need to restore
current->blocked because it is not modified by setup_signal_stack_*.

Acked-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Richard Weinberger <richard@nod.at>
Tested-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/arch/um/kernel/signal.c b/arch/um/kernel/signal.c
index e8b889d..8382e0b 100644 (file)
--- a/arch/um/kernel/signal.c
+++ b/arch/um/kernel/signal.c
@@ -65,13 +65,9 @@ static int handle_signal(struct pt_regs *regs, unsigned long signr,
 #endif
                err = setup_signal_stack_si(sp, signr, ka, regs, info, oldset);
 
-       if (err) {
-               spin_lock_irq(&current->sighand->siglock);
-               current->blocked = *oldset;
-               recalc_sigpending();
-               spin_unlock_irq(&current->sighand->siglock);
+       if (err)
                force_sigsegv(signr, current);
-       } else {
+       else {
                spin_lock_irq(&current->sighand->siglock);
                sigorsets(&current->blocked, &current->blocked,
                          &ka->sa.sa_mask);