From: Oleg Nesterov <oleg@redhat.com>
Date: Wed, 3 Jul 2013 22:08:32 +0000 (-0700)
Subject: kernel/fork.c:copy_process(): consolidate the lockless CLONE_THREAD checks
X-Git-Tag: omap-for-v3.11/fixes-for-merge-window~17^2~42
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=18c830df771f2ba8b4699fea9af1492275ae627b;p=pandora-kernel.git

kernel/fork.c:copy_process(): consolidate the lockless CLONE_THREAD checks

copy_process() does a lot of "chaotic" initializations and checks
CLONE_THREAD twice before it takes tasklist.  In particular it sets
"p->group_leader = p" and then changes it again under tasklist if
!thread_group_leader(p).

This looks a bit confusing, lets create a single "if (CLONE_THREAD)" block
which initializes ->exit_signal, ->group_leader, and ->tgid.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: "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>
---

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