From ab126ea63866d331437cb87c3e0026b587e7a1a6 Mon Sep 17 00:00:00 2001
From: Anton Vorontsov <anton.vorontsov@linaro.org>
Date: Thu, 31 May 2012 16:26:25 -0700
Subject: [PATCH] --- yaml --- r: 309751 b: refs/heads/master c:
 9bd0a077122a6b15069aab7a59c8f50f736fa1dd h: refs/heads/master i:   309749:
 ba9a3f1d0b18e884aae921b52d1bda1ccab91caa   309747:
 f4da702a0194e92b351c502098d4b8eda674ace9   309743:
 70e36d3c9fc89ff49c8602408809be2527d7b3cb v: v3

---
 [refs]                        | 2 +-
 trunk/arch/um/kernel/reboot.c | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 819017636f89..05418443af7f 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: af1be5a578a1ccc9961c55290f8c509a00a69036
+refs/heads/master: 9bd0a077122a6b15069aab7a59c8f50f736fa1dd
diff --git a/trunk/arch/um/kernel/reboot.c b/trunk/arch/um/kernel/reboot.c
index 4d93dff6b371..66d754c46e7b 100644
--- a/trunk/arch/um/kernel/reboot.c
+++ b/trunk/arch/um/kernel/reboot.c
@@ -4,6 +4,7 @@
  */
 
 #include "linux/sched.h"
+#include "linux/spinlock.h"
 #include "linux/slab.h"
 #include "kern_util.h"
 #include "os.h"
@@ -22,6 +23,7 @@ static void kill_off_processes(void)
 		struct task_struct *p;
 		int pid;
 
+		read_lock(&tasklist_lock);
 		for_each_process(p) {
 			if (p->mm == NULL)
 				continue;
@@ -29,6 +31,7 @@ static void kill_off_processes(void)
 			pid = p->mm->context.id.u.pid;
 			os_kill_ptraced_process(pid, 1);
 		}
+		read_unlock(&tasklist_lock);
 	}
 }