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authorOleg Nesterov <oleg@redhat.com>2009-06-17 16:27:36 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-18 13:03:52 -0700
commit77d1ef79568b337f599b75795acc8f78a87ba9ba (patch)
tree4fc0f622c6e064e76e6fd28981c3375ee3d153a9 /kernel
parente49612544c695117644af48bb4625264a3d2918f (diff)
downloadlinux-2.6.34-ux500-77d1ef79568b337f599b75795acc8f78a87ba9ba.tar.gz
wait_task_zombie: do not use thread_group_cputime()
There is no reason for thread_group_cputime() in wait_task_zombie(), there must be no other threads. This call was previously needed to collect the per-cpu data which we do not have any longer. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Roland McGrath <roland@redhat.com> Cc: Stanislaw Gruszka <sgruszka@redhat.com> Cc: Vitaly Mayatskikh <vmayatsk@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/exit.c16
1 files changed, 6 insertions, 10 deletions
diff --git a/kernel/exit.c b/kernel/exit.c
index 826e1dc8168..94a9992e6fd 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -1191,7 +1191,6 @@ static int wait_task_zombie(struct task_struct *p, int options,
if (likely(!traced)) {
struct signal_struct *psig;
struct signal_struct *sig;
- struct task_cputime cputime;
/*
* The resource counters for the group leader are in its
@@ -1207,23 +1206,20 @@ static int wait_task_zombie(struct task_struct *p, int options,
* need to protect the access to parent->signal fields,
* as other threads in the parent group can be right
* here reaping other children at the same time.
- *
- * We use thread_group_cputime() to get times for the thread
- * group, which consolidates times for all threads in the
- * group including the group leader.
*/
- thread_group_cputime(p, &cputime);
spin_lock_irq(&p->real_parent->sighand->siglock);
psig = p->real_parent->signal;
sig = p->signal;
psig->cutime =
cputime_add(psig->cutime,
- cputime_add(cputime.utime,
- sig->cutime));
+ cputime_add(p->utime,
+ cputime_add(sig->utime,
+ sig->cutime)));
psig->cstime =
cputime_add(psig->cstime,
- cputime_add(cputime.stime,
- sig->cstime));
+ cputime_add(p->stime,
+ cputime_add(sig->stime,
+ sig->cstime)));
psig->cgtime =
cputime_add(psig->cgtime,
cputime_add(p->gtime,