From: Filipe Manana <fdmanana@gmail.com>
Date: Fri, 21 Mar 2014 12:46:54 +0000 (+0000)
Subject: Btrfs: send, avoid unnecessary inode item lookup in the btree
X-Git-Tag: omap-for-v3.16/fixes-against-rc1~54^2~55
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b46ab97bcd4ae7954b3a150f642a82cdd1434f40;p=pandora-kernel.git

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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