linux-kernel - [PATCH RESEND 1/2] signals: annotate lock context change on ptrace

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Message-Id: <1285473231-6229-1-git-send-email-namhyung@gmail.com>
Date:	Sun, 26 Sep 2010 12:53:50 +0900
From:	Namhyung Kim <namhyung@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>
Cc:	Roland McGrath <roland@...hat.com>,
	Oleg Nesterov <oleg@...hat.com>, linux-kernel@...r.kernel.org
Subject: [PATCH RESEND 1/2] signals: annotate lock context change on ptrace_stop()

ptrace_stop() releases and regrabs current->sighand->siglock but
was missing proper annotation. Add it.

Signed-off-by: Namhyung Kim <namhyung@...il.com>
Acked-by: Roland McGrath <roland@...hat.com>
---
 kernel/signal.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/kernel/signal.c b/kernel/signal.c
index e4e8cfe..dce5c78 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -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)) {
 		/*
-- 
1.7.2.2

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