tree e35b870101fbc6a2ea6e0399429d9c23707697f3
parent 5a18fff2090c3af830d699c8ccb230498a1e37e5
author Al Viro <viro@zeniv.linux.org.uk> 1299729887 -0500
committer Al Viro <viro@zeniv.linux.org.uk> 1300108527 -0400

reduce vfs_path_lookup() to do_path_lookup()

New lookup flag: LOOKUP_ROOT.  nd->root is set (and held) by caller,
path_init() starts walking from that place and all pathname resolution
machinery never drops nd->root if that flag is set.  That turns
vfs_path_lookup() into a special case of do_path_lookup() *and*
gets us down to 3 callers of link_path_walk(), making it finally
feasible to rip the handling of trailing symlink out of link_path_walk().
That will not only simply the living hell out of it, but make life
much simpler for unionfs merge.  Trailing symlink handling will
become iterative, which is a good thing for stack footprint in
a lot of situations as well.

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