On Fri, Dec 07, 2018 at 02:16:19PM +0800, Nicolas Boichat wrote: > +#ifdef CONFIG_ZONE_DMA32 > +#define ARM_V7S_TABLE_GFP_DMA GFP_DMA32 > +#define ARM_V7S_TABLE_SLAB_CACHE SLAB_CACHE_DMA32 This name doesn't make any sense. Why not ARM_V7S_TABLE_SLAB_FLAGS ? > +#else > +#define ARM_V7S_TABLE_GFP_DMA GFP_DMA > +#define ARM_V7S_TABLE_SLAB_CACHE SLAB_CACHE_DMA Can you remind me again why it is, on machines which don't support ZONE_DMA32, why we have to allocate from ZONE_DMA? My understanding is that 64-bit machines have ZONE_DMA32 and 32-bit machines don't. So shouldn't this rather be GFP_KERNEL? Actually, maybe we could centralise this in gfp.h: #ifdef CONFIG_64BIT # ifdef CONFIG_ZONE_DMA32 #define GFP_32BIT GFP_DMA32 # else #define GFP_32BIT GFP_DMA #else /* 32-bit */ #define GFP_32BIT GFP_KERNEL #endif
