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| author | Oleg Nesterov <oleg@tv-sign.ru> | 2008-02-08 04:19:07 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-08 09:22:27 -0800 |
| commit | c543f1ee08ea6c2176dbdc47df0d0f6357c88713 (patch) | |
| tree | ae2d4de96aabbafd3792316d14f40330ec64572d /kernel/exit.c | |
| parent | 3a515e4a62dbf7e4c213740268a5267faa69e5b2 (diff) | |
| download | lwn-c543f1ee08ea6c2176dbdc47df0d0f6357c88713.tar.gz lwn-c543f1ee08ea6c2176dbdc47df0d0f6357c88713.zip | |
wait_task_zombie: remove ->exit_state/exit_signal checks for WNOWAIT
The first "p->exit_state != EXIT_ZOMBIE" check doesn't make too much sense.
The exit_state was EXIT_ZOMBIE when the function was called, and another
thread can change it to EXIT_DEAD right after the check.
The second condition is not possible, detached non-traced threads were already
filtered out by eligible_child(), we didn't drop tasklist since then.
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.c | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/kernel/exit.c b/kernel/exit.c index dee8b4d63403..42a8713b2050 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -1196,10 +1196,6 @@ static int wait_task_zombie(struct task_struct *p, int noreap, int exit_code = p->exit_code; int why, status; - if (unlikely(p->exit_state != EXIT_ZOMBIE)) - return 0; - if (unlikely(p->exit_signal == -1 && p->ptrace == 0)) - return 0; get_task_struct(p); read_unlock(&tasklist_lock); if ((exit_code & 0x7f) == 0) { |