tree 575b1aa7e37ab0fd8b00c9b756d107232e5aca7e
parent 482db9066199813d6b999b65a3171afdbec040b6
author Al Viro <viro@zeniv.linux.org.uk> 1382735067 -0400
committer Al Viro <viro@zeniv.linux.org.uk> 1384571057 -0500

fold try_to_ascend() into the sole remaining caller

There used to be a bunch of tree-walkers in dcache.c, all alike.
try_to_ascend() had been introduced to abstract a piece of logics
duplicated in all of them.  These days all these tree-walkers are
implemented via the same iterator (d_walk()), which is the only
remaining caller of try_to_ascend(), so let's fold it back...

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