From: William Lee Irwin III I was just looking over this and noticed 2.4.x makes u64 dma_addr_t conditional on CONFIG_HIGHMEM64G where 2.5.x uses CONFIG_HIGHMEM. It's clearly not necessary on CONFIG_HIGHMEM4G, hence this obvious patch. include/asm-i386/types.h | 2 +- 1 files changed, 1 insertion(+), 1 deletion(-) diff -puN include/asm-i386/types.h~large-dma_addr_t-PAE-only include/asm-i386/types.h --- 25/include/asm-i386/types.h~large-dma_addr_t-PAE-only 2003-05-17 14:09:33.000000000 -0700 +++ 25-akpm/include/asm-i386/types.h 2003-05-17 14:09:33.000000000 -0700 @@ -51,7 +51,7 @@ typedef unsigned long long u64; /* DMA addresses come in generic and 64-bit flavours. */ -#ifdef CONFIG_HIGHMEM +#ifdef CONFIG_HIGHMEM64G typedef u64 dma_addr_t; #else typedef u32 dma_addr_t; _