gfs2: fix d_revalidate oopsen on NFS exports
can't blindly check nd->flags in ->d_revalidate() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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@ -44,7 +44,7 @@ static int gfs2_drevalidate(struct dentry *dentry, struct nameidata *nd)
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int error;
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int error;
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int had_lock = 0;
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int had_lock = 0;
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if (nd->flags & LOOKUP_RCU)
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if (nd && nd->flags & LOOKUP_RCU)
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return -ECHILD;
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return -ECHILD;
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parent = dget_parent(dentry);
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parent = dget_parent(dentry);
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