From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sun, 13 Mar 2011 23:58:58 +0000 (-0400)
Subject: pull handling of one pathname component into a helper
X-Git-Tag: v2.6.39-rc1~514^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ce57dfc1791221ef58b6d6b8f5437fccefc4e187;p=pandora-kernel.git

pull handling of one pathname component into a helper

new helper: walk_component().  Handles everything except symlinks;
returns negative on error, 0 on success and 1 on symlinks we decided
to follow.  Drops out of RCU mode on such symlinks.

link_path_walk() and do_last() switched to using that.

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