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authorJ. Bruce Fields <bfields@redhat.com>2013-10-15 23:03:16 +0200
committerTrond Myklebust <Trond.Myklebust@netapp.com>2013-10-29 00:19:19 +0100
commita3f432bfd06a4ec3b812e32d3266e0d1ad75d008 (patch)
tree0e360753066b9dc61df85b2c5234f544ff418527 /fs/afs
parentSUNRPC: Fix buffer overflow checking in gss_encode_v0_msg/gss_encode_v1_msg (diff)
downloadlinux-a3f432bfd06a4ec3b812e32d3266e0d1ad75d008.tar.xz
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nfs: use IS_ROOT not DCACHE_DISCONNECTED
This check was added by Al Viro with d9e80b7de91db05c1c4d2e5ebbfd70b3b3ba0e0f "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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