From: Paul Menage <menage@google.com>
Date: Thu, 7 Feb 2008 08:13:45 +0000 (-0800)
Subject: cgroups: move cgroups destroy() callbacks to cgroup_diput()
X-Git-Tag: v2.6.25-rc1~482
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8dc4f3e17dd5f7e59ce568155ccd8974af879315;p=pandora-kernel.git

cgroups: move cgroups destroy() callbacks to cgroup_diput()

Move the calls to the cgroup subsystem destroy() methods from
cgroup_rmdir() to cgroup_diput().  This allows control file reads and
writes to access their subsystem state without having to be concerned with
locking against cgroup destruction - the control file dentry will keep the
cgroup and its subsystem state objects alive until the file is closed.

The documentation is updated to reflect the changed semantics of destroy();
additionally the locking comments for destroy() and some other methods were
clarified and decrustified.

Signed-off-by: Paul Menage <menage@google.com>
Cc: Paul Jackson <pj@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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