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| author | Oleg Nesterov <oleg@redhat.com> | 2014-12-10 15:55:05 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-12-10 17:41:17 -0800 |
| commit | 3750ef979cfa1296630aa9f23e265c1bd721498a (patch) | |
| tree | ec0da6a3d2c2ee8b989e0826817a4c5ea45b4627 /kernel/exit.c | |
| parent | 7d24e2df52f596a1ea922e4f84a61f2fb24fbb70 (diff) | |
| download | lwn-3750ef979cfa1296630aa9f23e265c1bd721498a.tar.gz lwn-3750ef979cfa1296630aa9f23e265c1bd721498a.zip | |
exit: reparent: s/while_each_thread/for_each_thread/ in find_new_reaper()
Change find_new_reaper() to use for_each_thread() instead of deprecated
while_each_thread(). We do not bother to check "thread != father" in the
1st loop, we can rely on PF_EXITING check.
Note: this means the minor behavioural change: for_each_thread() starts
from the group leader. But this should be fine, nobody should make any
assumption about do_wait(__WNOTHREAD) when it comes to reparented tasks.
And this can avoid the pointless reparenting to a short-living thread
While zombie leaders are not that common.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Aaron Tomlin <atomlin@redhat.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Kay Sievers <kay@vrfy.org>
Cc: Lennart Poettering <lennart@poettering.net>
Cc: Sterling Alexander <stalexan@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.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/kernel/exit.c b/kernel/exit.c index 9babd47a36e2..a4204aaba8a2 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -473,8 +473,7 @@ static struct task_struct *find_new_reaper(struct task_struct *father) struct pid_namespace *pid_ns = task_active_pid_ns(father); struct task_struct *thread; - thread = father; - while_each_thread(father, thread) { + for_each_thread(father, thread) { if (thread->flags & PF_EXITING) continue; if (unlikely(pid_ns->child_reaper == father)) @@ -511,11 +510,10 @@ static struct task_struct *find_new_reaper(struct task_struct *father) break; if (!reaper->signal->is_child_subreaper) continue; - thread = reaper; - do { + for_each_thread(reaper, thread) { if (!(thread->flags & PF_EXITING)) return thread; - } while_each_thread(reaper, thread); + } } } |