From: Jeff Layton <jlayton@redhat.com>
Date: Mon, 3 Feb 2014 17:13:09 +0000 (-0500)
Subject: locks: skip deadlock detection on FL_FILE_PVT locks
X-Git-Tag: v3.15-rc1~98^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=57b65325fe34ec4c917bc4e555144b4a94d9e1f7;p=pandora-kernel.git

locks: skip deadlock detection on FL_FILE_PVT locks

It's not really feasible to do deadlock detection with FL_FILE_PVT
locks since they aren't owned by a single task, per-se. Deadlock
detection also tends to be rather expensive so just skip it for
these sorts of locks.

Also, add a FIXME comment about adding more limited deadlock detection
that just applies to ro -> rw upgrades, per Andy's request.

Cc: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
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