signals: annotate lock context change on ptrace_stop()
Namhyung Kim [Wed, 27 Oct 2010 22:34:07 +0000 (15:34 -0700)]
ptrace_stop() releases and regrabs current->sighand->siglock but was
missing proper annotation.  Add it.

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Acked-by: Roland McGrath <roland@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

kernel/signal.c

index e921409..4e3cff1 100644 (file)
@@ -1618,6 +1618,8 @@ static int sigkill_pending(struct task_struct *tsk)
  * is gone, we keep current->exit_code unless clear_code.
  */
 static void ptrace_stop(int exit_code, int clear_code, siginfo_t *info)
+       __releases(&current->sighand->siglock)
+       __acquires(&current->sighand->siglock)
 {
        if (arch_ptrace_stop_needed(exit_code, info)) {
                /*