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| author | Oleg Nesterov <oleg@tv-sign.ru> | 2008-07-25 01:47:29 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-25 10:53:38 -0700 |
| commit | 3854a771821c970065e3203a0b40ddc4101538cc (patch) | |
| tree | b6f56b8d426c4a9682dfc8605a08a5c60f96a599 | |
| parent | 100360f03077663b7bef3af44805b6cf700c3bee (diff) | |
| download | linux-3.10-3854a771821c970065e3203a0b40ddc4101538cc.tar.gz linux-3.10-3854a771821c970065e3203a0b40ddc4101538cc.tar.bz2 linux-3.10-3854a771821c970065e3203a0b40ddc4101538cc.zip | |
__exit_signal: don't take rcu lock
There is no reason for rcu_read_lock() in __exit_signal(). tsk->sighand
can only be changed if tsk does exec, obviously this is not possible.
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>
| -rw-r--r-- | kernel/exit.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/kernel/exit.c b/kernel/exit.c index 93d2711b938..a7799d8a640 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -85,7 +85,6 @@ static void __exit_signal(struct task_struct *tsk) BUG_ON(!sig); BUG_ON(!atomic_read(&sig->count)); - rcu_read_lock(); sighand = rcu_dereference(tsk->sighand); spin_lock(&sighand->siglock); @@ -136,7 +135,6 @@ static void __exit_signal(struct task_struct *tsk) tsk->signal = NULL; tsk->sighand = NULL; spin_unlock(&sighand->siglock); - rcu_read_unlock(); __cleanup_sighand(sighand); clear_tsk_thread_flag(tsk,TIF_SIGPENDING); |