PG_uncached        20 arch/x86/include/asm/cacheflush.h #define _PGMT_UC_MINUS		(1UL << PG_uncached)
PG_uncached        21 arch/x86/include/asm/cacheflush.h #define _PGMT_WB		(1UL << PG_uncached | 1UL << PG_arch_1)
PG_uncached        22 arch/x86/include/asm/cacheflush.h #define _PGMT_MASK		(1UL << PG_uncached | 1UL << PG_arch_1)