signal: use current->state helpers

Call __set_current_state() instead of assigning the new state directly.
These interfaces also aid CONFIG_DEBUG_ATOMIC_SLEEP environments, keeping
track of who changed the state.

Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Acked-by: Oleg Nesterov <oleg@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 33a5275..a390499 100644 (file)
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -3550,7 +3550,7 @@ SYSCALL_DEFINE2(signal, int, sig, __sighandler_t, handler)
 SYSCALL_DEFINE0(pause)
 {
        while (!signal_pending(current)) {
-               current->state = TASK_INTERRUPTIBLE;
+               __set_current_state(TASK_INTERRUPTIBLE);
                schedule();
        }
        return -ERESTARTNOHAND;
@@ -3563,7 +3563,7 @@ int sigsuspend(sigset_t *set)
        current->saved_sigmask = current->blocked;
        set_current_blocked(set);
 
-       current->state = TASK_INTERRUPTIBLE;
+       __set_current_state(TASK_INTERRUPTIBLE);
        schedule();
        set_restore_sigmask();
        return -ERESTARTNOHAND;