Hey Ben/Michael, Why does 0xa410 value of DSISR called weird here ? What does this signify ? Just wondering if we can replace it with a meaningful macro instead. arch/powerpc/kernel/exceptions-64s.S /* * Hash table stuff */ .align 7 do_hash_page: std r3,_DAR(r1) std r4,_DSISR(r1) andis. r0,r4,0xa410 /* weird error? */ Regards Anshuman