tree 5e4aa273b714b3e10a360f71c2178de66f83bd66
parent 4e44b6852e03c915618ca6776b6697b436246b00
author Al Viro <viro@zeniv.linux.org.uk> 1239119056 -0400
committer Al Viro <viro@zeniv.linux.org.uk> 1244770558 -0400

Preparations to caching root in path_walk()

Split do_path_lookup(), opencode the call from do_filp_open()
do_filp_open() is the only caller of do_path_lookup() that
cares about root afterwards (it keeps resolving symlinks on
O_CREAT path after it'd done LOOKUP_PARENT walk).  So when
we start caching fs->root in path_walk(), it'll need a different
treatment.

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