fs/exec.c:de_thread(): use change_pid() rather than detach_pid/attach_pid
authorOleg Nesterov <oleg@redhat.com>
Wed, 3 Jul 2013 22:08:25 +0000 (15:08 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 3 Jul 2013 23:08:02 +0000 (16:08 -0700)
commit3f4185483832ccf3d2977923db576fa689c2abce
treeb977552009147be3c15097405f58f0519d29184a
parent888ffc5923e4343a78575918ab781e85fa22d244
fs/exec.c:de_thread(): use change_pid() rather than detach_pid/attach_pid

de_thread() can use change_pid() instead of detach + attach.  This looks
better and this ensures that, say, next_thread() can never see a task with
->pid == NULL.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Pavel Emelyanov <xemul@parallels.com>
Cc: Sergey Dyasly <dserrg@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
fs/exec.c