[PATCH] uml: fix major & minor handling in hostfs

[PATCH] uml: fix major & minor handling in hostfs

Currently hostfs passes the rdev value from stat() on the host as rdev
value to return to stat() on the guest; but we cannot pass rdev as is
because glibc and the kernel disagree about its definition.  So we must
decode it in a major/minor couple with glibc macros and re-encode it in
kernelspace code.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade_spam@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>