hi,

> > i think (dvp, name) pair is enough to check if it's a mount point or not
> > in that case.  it isn't very pretty, though.
> 
> That is all that needs to be passed in, true. To me the question is how 
> much work are we trading? We'd save the VOP_LOOKUP() (which could be a big 
> deal), but we then have more complexity in each file system so they can do 
> the mount-point test themselves.

what i meant is, filesystem independent code can do the test
before calling VOP_REMOVE.

YAMAMOTO Takashi