If the file backing a ubd device is not an even blocklength, then the last
partial block is now readable, and it is padded with zeros.
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>