r Al Viro <viro@zeniv.linux.org.uk> 1295115173 -0500
committer Al Viro <viro@zeniv.linux.org.uk> 1295139819 -0500

do_lookup() fix

do_lookup() has a path leading from LOOKUP_RCU case to non-RCU
crossing of mountpoints, which breaks things badly.  If we
hit need_revalidate: and do nothing in there, we need to come
back into LOOKUP_RCU half of things, not to done: in non-RCU
one.

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