Commit c25fff71 authored Feb 13, 2019 by Jesper Dangaard Brouer Committed by David S. Miller Feb 13, 2019

mm: add dma_addr_t to struct page



The page_pool API is using page->private to store DMA addresses.
As pointed out by David Miller we can't use that on 32-bit architectures
with 64-bit DMA

This patch adds a new dma_addr_t struct to allow storing DMA addresses

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent fb14b096

include/linux/mm_types.h

+7 −0

Original line number	Diff line number	Diff line
		@@ -95,6 +95,13 @@ struct page {
		*/
		unsigned long private;
		};
		struct { /* page_pool used by netstack */
		/**
		* @dma_addr: might require a 64-bit value even on
		* 32-bit architectures.
		*/
		dma_addr_t dma_addr;
		};
		struct { /* slab, slob and slub */
		union {
		struct list_head slab_list; /* uses lru */

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