From: Andrew Morton <akpm@osdl.org>

Cc: Nippun Goel <nippung@calsoftinc.com>
Cc: Ravikiran Thirumalai <kiran@scalex86.org>
Cc: Shai Fultheim <shai@scalex86.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 kernel/sys.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletion(-)

diff -puN kernel/sys.c~avoid-taking-global-tasklist_lock-for-single-threadedprocess-at-getrusage-tidy kernel/sys.c
--- 25/kernel/sys.c~avoid-taking-global-tasklist_lock-for-single-threadedprocess-at-getrusage-tidy	Fri Jan 13 17:54:05 2006
+++ 25-akpm/kernel/sys.c	Fri Jan 13 17:54:05 2006
@@ -1715,7 +1715,9 @@ static void k_getrusage(struct task_stru
 	memset((char *) r, 0, sizeof *r);
 	utime = stime = cputime_zero;
 
-	need_lock = !(p == current && thread_group_empty(p));
+	if (p != current || !thread_group_empty(p))
+		need_lock = 1;
+
 	if (need_lock) {
 		read_lock(&tasklist_lock);
 		if (unlikely(!p->signal)) {
_