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dma/direct: turn ARCH_ZONE_DMA_BITS into a variable

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Some architectures, notably ARM, are interested in tweaking this
depending on their runtime DMA addressing limitations.

Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Nicolas Saenz Julienne
2019-10-14 20:31:03 +02:00
committed by Catalin Marinas
parent 4686da5140
commit 8b5369ea58
8 changed files with 31 additions and 27 deletions
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2
arch/s390/include/asm/page.h
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@@ -177,8 +177,6 @@ static inline int devmem_is_allowed(unsigned long pfn)
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
#define ARCH_ZONE_DMA_BITS 31
#include <asm-generic/memory_model.h>
#include <asm-generic/getorder.h>