[RFC,2/3] include/linux/gfp.h: Add __get_dma32_pages macro
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Message ID 20181109082448.150302-3-drinkcat@chromium.org
State Superseded
Headers show
  • iommu/io-pgtable-arm-v7s: Use DMA32 zone for page tables
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Commit Message

Nicolas Boichat Nov. 9, 2018, 8:24 a.m. UTC
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 <drinkcat@chromium.org>
 include/linux/gfp.h | 2 ++
 1 file changed, 2 insertions(+)

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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);