REGION_SHIFT       23 arch/powerpc/include/asm/book3s/64/hash-4k.h #define H_KERN_MAP_SIZE		(ASM_CONST(1) << REGION_SHIFT)
REGION_SHIFT       86 arch/powerpc/include/asm/book3s/64/hash.h #define NON_LINEAR_REGION_ID(ea)	((((unsigned long)ea - H_KERN_VIRT_START) >> REGION_SHIFT) + 2)
REGION_SHIFT       64 arch/powerpc/include/asm/nohash/64/pgtable.h #define REGION_MASK		(0xfUL << REGION_SHIFT)
REGION_SHIFT       65 arch/powerpc/include/asm/nohash/64/pgtable.h #define REGION_ID(ea)		(((unsigned long)(ea)) >> REGION_SHIFT)