_PFN_SHIFT        169 arch/mips/include/asm/pgtable-bits.h # define _PFN_SHIFT		PAGE_SHIFT
_PFN_SHIFT        172 arch/mips/include/asm/pgtable-bits.h # define _PFN_SHIFT		(PAGE_SHIFT - 12 + _CACHE_SHIFT + 3)