_RPAGE_RSV2        41 arch/powerpc/include/asm/book3s/64/hash-4k.h #define H_PAGE_HASHPTE	_RPAGE_RSV2     /* software: PTE & hash are busy */
_RPAGE_RSV2        40 arch/powerpc/include/asm/book3s/64/hash-64k.h #define H_PTE_PKEY_BIT1	_RPAGE_RSV2