From 1f2f4b8dc3a7dc391f1b1342993c9b933486af4c Mon Sep 17 00:00:00 2001
From: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Date: Tue, 25 Aug 2009 18:02:37 +0200
Subject: [PATCH] --- yaml --- r: 158466 b: refs/heads/master c:
 cc3b13c11c567c69a6356be98d0c03ff11541d5c h: refs/heads/master v: v3

---
 [refs]                    | 2 +-
 trunk/kernel/tracepoint.c | 4 +++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/[refs] b/[refs]
index d131be732e2d..497d3179784b 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: cd0980fc8add25e8ab12fcf1051c0f20cbc7c0c0
+refs/heads/master: cc3b13c11c567c69a6356be98d0c03ff11541d5c
diff --git a/trunk/kernel/tracepoint.c b/trunk/kernel/tracepoint.c
index 1a6a453b7efb..9489a0a9b1be 100644
--- a/trunk/kernel/tracepoint.c
+++ b/trunk/kernel/tracepoint.c
@@ -597,7 +597,9 @@ void syscall_regfunc(void)
 	if (!sys_tracepoint_refcount) {
 		read_lock_irqsave(&tasklist_lock, flags);
 		do_each_thread(g, t) {
-			set_tsk_thread_flag(t, TIF_SYSCALL_TRACEPOINT);
+			/* Skip kernel threads. */
+			if (t->mm)
+				set_tsk_thread_flag(t, TIF_SYSCALL_TRACEPOINT);
 		} while_each_thread(g, t);
 		read_unlock_irqrestore(&tasklist_lock, flags);
 	}