do_task_stat: don't take rcu_read_lock()
authorOleg Nesterov <oleg@tv-sign.ru>
Wed, 30 Apr 2008 07:52:38 +0000 (00:52 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 30 Apr 2008 15:29:34 +0000 (08:29 -0700)
commit06fffb1267c9d986687b69d74a46ee332a50575e
treebfbef85a5fa65550f40d83e75d8e23cea5238772
parentd6cf723a142f63ccb92272bc0e9bfffd3c3a5cac
do_task_stat: don't take rcu_read_lock()

lock_task_sighand() was changed, and do_task_stat() doesn't need
rcu_read_lock any longer.  sighand->siglock protects all "interesting"
fields.

Except: it doesn't protect ->tty->pgrp, but neither does rcu_read_lock(), this
should be fixed.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Roland McGrath <roland@redhat.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Pavel Emelyanov <xemul@sw.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
fs/proc/array.c