REGMASK_BITS       59 arch/arm/mm/alignment.c #define REGMASK_BITS(i)	(i & 0xffff)
REGMASK_BITS       45 arch/unicore32/mm/alignment.c #define REGMASK_BITS(i)	(((i & 0x7fe00) >> 3) | (i & 0x3f))