From 9b4a9b14a793bc69b505ed916051f6f32db13bb8 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Tue, 7 Apr 2009 11:44:16 -0400
Subject: [PATCH] Preparations to caching root in path_walk()

Split do_path_lookup(), opencode the call from do_filp_open()
do_filp_open() is the only caller of do_path_lookup() that
cares about root afterwards (it keeps resolving symlinks on
O_CREAT path after it'd done LOOKUP_PARENT walk).  So when
we start caching fs->root in path_walk(), it'll need a different
treatment.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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