futex: Move exit_pi_state() call to release_mm()

exit_pi_state() is called from do_exit() but not from do_execve().
Move it to release_mm() so it gets called from do_execve() as well.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
LKML-Reference: <new-submission>
Cc: stable@kernel.org
Cc: Anirban Sinha <ani@anirban.org>
Cc: Peter Zijlstra <peterz@infradead.org>

kernel/fork.c

diff --git a/kernel/fork.c b/kernel/fork.c
index 88ef51c..341965b 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -553,6 +553,8 @@
 		tsk->compat_robust_list = NULL;
 	}
 #endif
+	if (unlikely(!list_empty(&tsk->pi_state_list)))
+		exit_pi_state_list(tsk);
 #endif
 
 	/* Get rid of any cached register state */