diff options
Diffstat (limited to 'include/linux/gfp.h')
| -rw-r--r-- | include/linux/gfp.h | 36 |
1 files changed, 23 insertions, 13 deletions
diff --git a/include/linux/gfp.h b/include/linux/gfp.h index cc9e60844484..8b34aabfe4c6 100644 --- a/include/linux/gfp.h +++ b/include/linux/gfp.h @@ -9,17 +9,16 @@ struct vm_area_struct; /* * GFP bitmasks.. + * + * Zone modifiers (see linux/mmzone.h - low three bits) + * + * Do not put any conditional on these. If necessary modify the definitions + * without the underscores and use the consistently. The definitions here may + * be used in bit comparisons. */ -/* Zone modifiers in GFP_ZONEMASK (see linux/mmzone.h - low three bits) */ #define __GFP_DMA ((__force gfp_t)0x01u) #define __GFP_HIGHMEM ((__force gfp_t)0x02u) -#ifdef CONFIG_DMA_IS_DMA32 -#define __GFP_DMA32 ((__force gfp_t)0x01) /* ZONE_DMA is ZONE_DMA32 */ -#elif BITS_PER_LONG < 64 -#define __GFP_DMA32 ((__force gfp_t)0x00) /* ZONE_NORMAL is ZONE_DMA32 */ -#else -#define __GFP_DMA32 ((__force gfp_t)0x04) /* Has own ZONE_DMA32 */ -#endif +#define __GFP_DMA32 ((__force gfp_t)0x04u) /* * Action modifiers - doesn't change the zoning @@ -46,6 +45,7 @@ struct vm_area_struct; #define __GFP_ZERO ((__force gfp_t)0x8000u)/* Return zeroed page on success */ #define __GFP_NOMEMALLOC ((__force gfp_t)0x10000u) /* Don't use emergency reserves */ #define __GFP_HARDWALL ((__force gfp_t)0x20000u) /* Enforce hardwall cpuset memory allocs */ +#define __GFP_THISNODE ((__force gfp_t)0x40000u)/* No fallback, no policies */ #define __GFP_BITS_SHIFT 20 /* Room for 20 __GFP_FOO bits */ #define __GFP_BITS_MASK ((__force gfp_t)((1 << __GFP_BITS_SHIFT) - 1)) @@ -54,7 +54,7 @@ struct vm_area_struct; #define GFP_LEVEL_MASK (__GFP_WAIT|__GFP_HIGH|__GFP_IO|__GFP_FS| \ __GFP_COLD|__GFP_NOWARN|__GFP_REPEAT| \ __GFP_NOFAIL|__GFP_NORETRY|__GFP_NO_GROW|__GFP_COMP| \ - __GFP_NOMEMALLOC|__GFP_HARDWALL) + __GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_THISNODE) /* This equals 0, but use constants in case they ever change */ #define GFP_NOWAIT (GFP_ATOMIC & ~__GFP_HIGH) @@ -67,6 +67,8 @@ struct vm_area_struct; #define GFP_HIGHUSER (__GFP_WAIT | __GFP_IO | __GFP_FS | __GFP_HARDWALL | \ __GFP_HIGHMEM) +#define GFP_THISNODE (__GFP_THISNODE | __GFP_NOWARN | __GFP_NORETRY) + /* Flag - indicates that the buffer will be suitable for DMA. Ignored on some platforms, used as appropriate on others */ @@ -76,11 +78,19 @@ struct vm_area_struct; #define GFP_DMA32 __GFP_DMA32 -static inline int gfp_zone(gfp_t gfp) +static inline enum zone_type gfp_zone(gfp_t flags) { - int zone = GFP_ZONEMASK & (__force int) gfp; - BUG_ON(zone >= GFP_ZONETYPES); - return zone; + if (flags & __GFP_DMA) + return ZONE_DMA; +#ifdef CONFIG_ZONE_DMA32 + if (flags & __GFP_DMA32) + return ZONE_DMA32; +#endif +#ifdef CONFIG_HIGHMEM + if (flags & __GFP_HIGHMEM) + return ZONE_HIGHMEM; +#endif + return ZONE_NORMAL; } /* |