[PATCH 4/5] freezer: clear fake signal on exit from __refrigerator

[Mandeep Singh Baines <msb@chromium.org>]

In freeze_task, a freeze request is sent as a fake signal.

Recalculate signal pending on exit from __refrigerator so that
TIF_SIGPENDING doesn't remain incorrectly set.

Signed-off-by: Mandeep Singh Baines <msb@chromium.org>
CC: Oleg Nesterov <oleg@redhat.com>
CC: Tejun Heo <tj@kernel.org>
CC: Andrew Morton <akpm@linux-foundation.org>
CC: Rafael J. Wysocki <rjw@sisk.pl>
CC: Ingo Molnar <mingo@redhat.com>
---
 kernel/freezer.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kernel/freezer.c b/kernel/freezer.c
index c38893b..fa66d0f 100644
--- a/kernel/freezer.c
+++ b/kernel/freezer.c
@@ -81,6 +81,9 @@ bool __refrigerator(bool check_kthr_stop)
 	 */
 	set_current_state(save);
 
+	/* Clear fake signal from freeze_task(). */
+	recalc_sigpending();
+
 	return was_frozen;
 }
 EXPORT_SYMBOL(__refrigerator);
-- 
1.7.12.4