On Thu, Feb 26, 2026 at 07:10:29AM -0800, Christoph Hellwig wrote: > Move the optimized XOR into lib/raid and include it it in xor.ko > instead of unconditionally building it into the main kernel image. > > Signed-off-by: Christoph Hellwig <[email protected]> > --- > arch/s390/lib/Makefile | 2 +- > lib/raid/xor/Makefile | 1 + > {arch/s390/lib => lib/raid/xor/s390}/xor.c | 2 -- > 3 files changed, 2 insertions(+), 3 deletions(-) > rename {arch/s390/lib => lib/raid/xor/s390}/xor.c (98%)
FWIW: Acked-by: Heiko Carstens <[email protected]> However, I just had a look at the s390 implementation and just saw that the inline assembly constraints for xor_xc_2() are incorrect. "bytes", "p1", and "p2" are input operands, while all three of them are modified within the inline assembly. Given that the function consists only of this inline assembly I doubt that this causes any harm, however I still want to fix this now; but your patch should apply fine with or without this fixed.
