From 4d081c41a4f98aecb5e86ef7d3e644cc7b52131f Mon Sep 17 00:00:00 2001
From: Chris Mason <chris.mason@oracle.com>
Date: Wed, 4 Feb 2009 09:31:28 -0500
Subject: [PATCH] Btrfs: change btrfs_del_leaf to drop locks earlier

btrfs_del_leaf does two things.  First it removes the pointer in the
parent, and then it frees the block that has the leaf.  It has the
parent node locked for both operations.

But, it only needs the parent locked while it is deleting the pointer.
After that it can safely free the block without the parent locked.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
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