From: Al Viro <viro@zeniv.linux.org.uk>
Date: Fri, 4 Mar 2011 19:44:37 +0000 (-0500)
Subject: get rid of the last LOOKUP_RCU dependencies in link_path_walk()
X-Git-Tag: v2.6.39-rc1~514^2~37
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=951361f954596bd134d4270df834f47d151f98a6;p=pandora-kernel.git

get rid of the last LOOKUP_RCU dependencies in link_path_walk()

New helper: terminate_walk().  An error has happened during pathname
resolution and we either drop nd->path or terminate RCU, depending
the mode we had been in.  After that, nd is essentially empty.
Switch link_path_walk() to using that for cleanup.

Now the top-level logics in link_path_walk() is back to sanity.  RCU
dependencies are in the lower-level functions.

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