From 46afd6f61cc33ae4b3a2aed4bb454d11d4114c27 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Fri, 1 May 2015 22:08:30 -0400
Subject: [PATCH] namei: lift nameidata into filename_mountpoint()

when we go for on-demand allocation of saved state in
link_path_walk(), we'll want nameidata to stay around
for all 3 calls of path_mountpoint().

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