This patch fixes a signedness bug with RAID6 for Altivec, and makes the
Altivec code testable in userspace.
Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>