namei: change calling conventions for lookup_{fast,slow} and follow_managed()

Have lookup_fast() return 1 on success and 0 on "need to fall back";
lookup_slow() and follow_managed() return positive (1) on success.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2016-03-05 22:04:59 -05:00
commit e9742b5332