From b46ab97bcd4ae7954b3a150f642a82cdd1434f40 Mon Sep 17 00:00:00 2001
From: Filipe Manana <fdmanana@gmail.com>
Date: Fri, 21 Mar 2014 12:46:54 +0000
Subject: [PATCH] Btrfs: send, avoid unnecessary inode item lookup in the btree

Regardless of whether the caller is interested or not in knowing the inode's
generation (dir_gen != NULL), get_first_ref always does a btree lookup to get
the inode item. Avoid this useless lookup if dir_gen parameter is NULL (which
is in some cases).

Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com>
Signed-off-by: Chris Mason <clm@fb.com>
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