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use __set_task_state() for TRACED/STOPPED tasks

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1. It is much easier to grep for ->state change if __set_task_state() is used
   instead of the direct assignment.

2. ptrace_stop() and handle_group_stop() use set_task_state() which adds the
   unneeded mb() (btw even if we use mb() it is still possible that do_wait()
   sees the new ->state but not ->exit_code, but this is ok).

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Acked-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Oleg Nesterov 2008-02-06 01:36:13 -08:00 • committed by Linus Torvalds
parent 06b8e878a9
commit d9ae90ac4b
3 changed files with 6 additions and 8 deletions
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2
kernel/fork.c
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@ -1510,7 +1510,7 @@ long do_fork(unsigned long clone_flags,
if (!(clone_flags & CLONE_STOPPED))
wake_up_new_task(p, clone_flags);
else
p->state = TASK_STOPPED;
__set_task_state(p, TASK_STOPPED);
if (unlikely (trace)) {
current->ptrace_message = nr;