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authorOleg Nesterov <oleg@tv-sign.ru>2007-10-17 08:26:59 +0200
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-17 17:42:51 +0200
commit442a10cf9e1c350b4de4dd6f22c72618a0b13d7f (patch)
tree13ab9fc1bd97be616511425d422e0c9188fbf5f3 /kernel/exit.c
parentzap_other_threads: don't optimize thread_group_empty() case (diff)
downloadlinux-442a10cf9e1c350b4de4dd6f22c72618a0b13d7f.tar.xz
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wait_task_zombie: don't fight with non-existing race with a dying ptracee
The "p->exit_signal == -1 && p->ptrace == 0" check and the comment are bogus. We already did exactly the same check in eligible_child(), we did not drop tasklist_lock since then, and both variables need write_lock(tasklist) to be changed. Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Cc: Roland McGrath <roland@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/exit.c')
-rw-r--r--kernel/exit.c7
1 files changed, 0 insertions, 7 deletions
diff --git a/kernel/exit.c b/kernel/exit.c
index 28144b94e55c..b27a3dcde671 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -1189,13 +1189,6 @@ static int wait_task_zombie(struct task_struct *p, int noreap,
BUG_ON(state != EXIT_DEAD);
return 0;
}
- if (unlikely(p->exit_signal == -1 && p->ptrace == 0)) {
- /*
- * This can only happen in a race with a ptraced thread
- * dying on another processor.
- */
- return 0;
- }
/* traced means p->ptrace, but not vice versa */
traced = (p->real_parent != p->parent);