tree b473278d0df8d869d183fbc0e4a1a07585de240a
parent 3a8cff4f026c0b98bee6291eb28d4df42feb76dc
author Christoph Hellwig <hch@lst.de> 1218462537 +0200
committer Al Viro <viro@zeniv.linux.org.uk> 1224753180 -0400

[PATCH] new helper: d_obtain_alias

The calling conventions of d_alloc_anon are rather unfortunate for all
users, and it's name is not very descriptive either.

Add d_obtain_alias as a new exported helper that drops the inode
reference in the failure case, too and allows to pass-through NULL
pointers and inodes to allow for tail-calls in the export operations.

Incidentally this helper already existed as a private function in
libfs.c as exportfs_d_alloc so kill that one and switch the callers
to d_obtain_alias.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>