From: Huaisheng Ye <yehs1@xxxxxxxxxx> When bit is equal to 0x4, it means OPT_ZONE_DMA32 should be got from GFP_ZONE_TABLE. OPT_ZONE_DMA32 shall be equal to ZONE_DMA32 or ZONE_NORMAL according to the status of CONFIG_ZONE_DMA32. Similarly, when bit is equal to 0xc, that means OPT_ZONE_DMA32 should be got with an allocation policy GFP_MOVABLE. So ZONE_DMA32 or ZONE_NORMAL is the possible result value. Signed-off-by: Huaisheng Ye <yehs1@xxxxxxxxxx> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Cc: Vlastimil Babka <vbabka@xxxxxxx> Cc: Michal Hocko <mhocko@xxxxxxxx> Cc: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx> Cc: Kate Stewart <kstewart@xxxxxxxxxxxxxxxxxxx> Cc: "Levin, Alexander (Sasha Levin)" <alexander.levin@xxxxxxxxxxx> Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx> Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx> --- include/linux/gfp.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/include/linux/gfp.h b/include/linux/gfp.h index 1a4582b..3f1b3dc 100644 --- a/include/linux/gfp.h +++ b/include/linux/gfp.h @@ -343,7 +343,7 @@ static inline bool gfpflags_allow_blocking(const gfp_t gfp_flags) * 0x1 => DMA or NORMAL * 0x2 => HIGHMEM or NORMAL * 0x3 => BAD (DMA+HIGHMEM) - * 0x4 => DMA32 or DMA or NORMAL + * 0x4 => DMA32 or NORMAL * 0x5 => BAD (DMA+DMA32) * 0x6 => BAD (HIGHMEM+DMA32) * 0x7 => BAD (HIGHMEM+DMA32+DMA) @@ -351,7 +351,7 @@ static inline bool gfpflags_allow_blocking(const gfp_t gfp_flags) * 0x9 => DMA or NORMAL (MOVABLE+DMA) * 0xa => MOVABLE (Movable is valid only if HIGHMEM is set too) * 0xb => BAD (MOVABLE+HIGHMEM+DMA) - * 0xc => DMA32 (MOVABLE+DMA32) + * 0xc => DMA32 or NORMAL (MOVABLE+DMA32) * 0xd => BAD (MOVABLE+DMA32+DMA) * 0xe => BAD (MOVABLE+DMA32+HIGHMEM) * 0xf => BAD (MOVABLE+DMA32+HIGHMEM+DMA) -- 1.8.3.1
