PMD_FLAGS_UP       31 arch/arm/mm/proc-v6.S #define PMD_FLAGS_UP	PMD_SECT_WB
PMD_FLAGS_UP       21 arch/arm/mm/proc-v7-2level.S #define PMD_FLAGS_UP	PMD_SECT_WB
PMD_FLAGS_UP       25 arch/arm/mm/proc-v7-3level.S #define PMD_FLAGS_UP	(PMD_SECT_WB)