> which places?  that makes a difference; if they *can* be converted

There's kernfs and fdesc which use it rather frequently. In my opinion,
ENODEV would do as well in these cases.

There are also a few isolated cases in the sparc port.

In vm_mmap.c, it's returned by a few unimplemented system calls. I would
think ENOSYS is appropriate here.

-pk



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