From: Al Viro <viro@zeniv.linux.org.uk>
Date: Tue, 7 Apr 2009 15:49:53 +0000 (-0400)
Subject: Cache root in nameidata
X-Git-Tag: v2.6.31-rc1~375^2~83
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2a737871108de9ba8930f7650d549f1383767f8b;p=pandora-kernel.git

Cache root in nameidata

New field: nd->root.  When pathname resolution wants to know the root,
check if nd->root.mnt is non-NULL; use nd->root if it is, otherwise
copy current->fs->root there.  After path_walk() is finished, we check
if we'd got a cached value in nd->root and drop it.  Before calling
path_walk() we should either set nd->root.mnt to NULL *or* copy (and
pin down) some path to nd->root.  In the latter case we won't be
looking at current->fs->root at all.

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

Reading git-diff-tree failed