nfs: use IS_ROOT not DCACHE_DISCONNECTED

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This check was added by Al Viro with
d9e80b7de9 "nfs d_revalidate() is too
trigger-happy with d_drop()", with the explanation that we don't want to
remove the root of a disconnected tree, which will still be included on
the s_anon list.

But DCACHE_DISCONNECTED does *not* actually identify dentries that are
disconnected from the dentry tree or hashed on s_anon.  IS_ROOT() is the
way to do that.

Also add a comment from Al's commit to remind us why this check is
there.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

...

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J. Bruce Fields 2013-10-15 17:03:16 -04:00 • committed by Trond Myklebust

parent 9d3a2260f0

commit a3f432bfd0

1 changed files with 7 additions and 1 deletions

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fs/nfs/dir.c

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