tree 2ba563181c06bbcbd68fe4144f98e6a31d813d81
parent 908790fa3b779d37365e6b28e3aa0f6e833020c3
author J. Bruce Fields <bfields@redhat.com> 1392678237 -0500
committer Al Viro <viro@zeniv.linux.org.uk> 1407436810 -0400

dcache: d_splice_alias should ignore DCACHE_DISCONNECTED

Any IS_ROOT() alias should be safe to use; there's nothing special about
DCACHE_DISCONNECTED dentries.

Note that this is in fact useful for filesystems such as btrfs which can
legimately encounter a directory with a preexisting IS_ROOT alias on a
lookup that crosses into a subvolume.  (Those aliases are currently
marked DCACHE_DISCONNECTED--but not really for any good reason, and
we'll change that soon.)

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>