From 5c1c669a1b2435e071d566b6db1a8e6b26542ba1 Mon Sep 17 00:00:00 2001
From: Jeff Layton <jeff.layton@primarydata.com>
Date: Fri, 3 Apr 2015 09:04:03 -0400
Subject: [PATCH] locks: don't allocate a lock context for an F_UNLCK request

In the event that we get an F_UNLCK request on an inode that has no lock
context, there is no reason to allocate one. Change
locks_get_lock_context to take a "type" pointer and avoid allocating a
new context if it's F_UNLCK.

Then, fix the callers to return appropriately if that function returns
NULL.

Signed-off-by: Jeff Layton <jlayton@primarydata.com>
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