diff options
Diffstat (limited to 'arch/x86/include/asm/cacheflush.h')
| -rw-r--r-- | arch/x86/include/asm/cacheflush.h | 38 |
1 files changed, 24 insertions, 14 deletions
diff --git a/arch/x86/include/asm/cacheflush.h b/arch/x86/include/asm/cacheflush.h index 9863ee3747da..157644bdf70e 100644 --- a/arch/x86/include/asm/cacheflush.h +++ b/arch/x86/include/asm/cacheflush.h @@ -9,10 +9,10 @@ /* * X86 PAT uses page flags WC and Uncached together to keep track of * memory type of pages that have backing page struct. X86 PAT supports 3 - * different memory types, _PAGE_CACHE_WB, _PAGE_CACHE_WC and - * _PAGE_CACHE_UC_MINUS and fourth state where page's memory type has not + * different memory types, _PAGE_CACHE_MODE_WB, _PAGE_CACHE_MODE_WC and + * _PAGE_CACHE_MODE_UC_MINUS and fourth state where page's memory type has not * been changed from its default (value of -1 used to denote this). - * Note we do not support _PAGE_CACHE_UC here. + * Note we do not support _PAGE_CACHE_MODE_UC here. */ #define _PGMT_DEFAULT 0 @@ -22,36 +22,40 @@ #define _PGMT_MASK (1UL << PG_uncached | 1UL << PG_arch_1) #define _PGMT_CLEAR_MASK (~_PGMT_MASK) -static inline unsigned long get_page_memtype(struct page *pg) +static inline enum page_cache_mode get_page_memtype(struct page *pg) { unsigned long pg_flags = pg->flags & _PGMT_MASK; if (pg_flags == _PGMT_DEFAULT) return -1; else if (pg_flags == _PGMT_WC) - return _PAGE_CACHE_WC; + return _PAGE_CACHE_MODE_WC; else if (pg_flags == _PGMT_UC_MINUS) - return _PAGE_CACHE_UC_MINUS; + return _PAGE_CACHE_MODE_UC_MINUS; else - return _PAGE_CACHE_WB; + return _PAGE_CACHE_MODE_WB; } -static inline void set_page_memtype(struct page *pg, unsigned long memtype) +static inline void set_page_memtype(struct page *pg, + enum page_cache_mode memtype) { - unsigned long memtype_flags = _PGMT_DEFAULT; + unsigned long memtype_flags; unsigned long old_flags; unsigned long new_flags; switch (memtype) { - case _PAGE_CACHE_WC: + case _PAGE_CACHE_MODE_WC: memtype_flags = _PGMT_WC; break; - case _PAGE_CACHE_UC_MINUS: + case _PAGE_CACHE_MODE_UC_MINUS: memtype_flags = _PGMT_UC_MINUS; break; - case _PAGE_CACHE_WB: + case _PAGE_CACHE_MODE_WB: memtype_flags = _PGMT_WB; break; + default: + memtype_flags = _PGMT_DEFAULT; + break; } do { @@ -60,8 +64,14 @@ static inline void set_page_memtype(struct page *pg, unsigned long memtype) } while (cmpxchg(&pg->flags, old_flags, new_flags) != old_flags); } #else -static inline unsigned long get_page_memtype(struct page *pg) { return -1; } -static inline void set_page_memtype(struct page *pg, unsigned long memtype) { } +static inline enum page_cache_mode get_page_memtype(struct page *pg) +{ + return -1; +} +static inline void set_page_memtype(struct page *pg, + enum page_cache_mode memtype) +{ +} #endif /* |