From: Oleg Nesterov <oleg@redhat.com>
Date: Fri, 10 Jul 2009 01:27:38 +0000 (+0200)
Subject: mm_for_maps: shift down_read(mmap_sem) to the caller
X-Git-Tag: v2.6.27.30~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=60634e4b830850bb38016f1e6a7a7358eba8118c;p=pandora-kernel.git

mm_for_maps: shift down_read(mmap_sem) to the caller

commit 00f89d218523b9bf6b522349c039d5ac80aa536d upstream.

mm_for_maps() takes ->mmap_sem after security checks, this looks
strange and obfuscates the locking rules. Move this lock to its
single caller, m_start().

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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