[PATCH RFC 2/3] include/linux/gfp.h: Add __get_dma32_pages macro
From: Nicolas Boichat <hidden>
Date: 2018-11-09 08:25:10
Also in:
linux-iommu, linux-mm, lkml
Subsystem:
memory management - core, memory management - page allocator, the rest · Maintainers:
Andrew Morton, David Hildenbrand, Vlastimil Babka, Linus Torvalds
Some callers (e.g. iommu/io-pgtable-arm-v7s) require DMA32 memory
when calling __get_dma_pages. Add a new macro for that purpose.
Fixes: ad67f5a6545f ("arm64: replace ZONE_DMA with ZONE_DMA32")
Signed-off-by: Nicolas Boichat <redacted>
---
include/linux/gfp.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/include/linux/gfp.h b/include/linux/gfp.h
index 76f8db0b0e715c..50e04896b78017 100644
--- a/include/linux/gfp.h
+++ b/include/linux/gfp.h@@ -535,6 +535,8 @@ void * __meminit alloc_pages_exact_nid(int nid, size_t size, gfp_t gfp_mask); #define __get_dma_pages(gfp_mask, order) \ __get_free_pages((gfp_mask) | GFP_DMA, (order)) +#define __get_dma32_pages(gfp_mask, order) \ + __get_free_pages((gfp_mask) | GFP_DMA32, (order)) extern void __free_pages(struct page *page, unsigned int order); extern void free_pages(unsigned long addr, unsigned int order);
--
2.19.1.930.g4563a0d9d0-goog