__GFP_DMA32
WARN_ON((gfp & __GFP_DMA32) && (last_pfn >= 0x00100000UL));
mask |= __GFP_DMA32;
gfp |= __GFP_DMA32;
page = alloc_page(GFP_KERNEL | __GFP_DMA32 | __GFP_ZERO);
#define GFP_DMA32 __GFP_DMA32