From: Nicolas Boichat <drinkcat@chromium.org>
To: Robin Murphy <robin.murphy@arm.com>
Cc: Will Deacon <will.deacon@arm.com>, Joerg Roedel <joro@8bytes.org>,
Christoph Lameter <cl@linux.com>,
Pekka Enberg <penberg@kernel.org>,
David Rientjes <rientjes@google.com>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>,
Andrew Morton <akpm@linux-foundation.org>,
Vlastimil Babka <vbabka@suse.cz>, Michal Hocko <mhocko@suse.com>,
Mel Gorman <mgorman@techsingularity.net>,
Levin Alexander <alexander.levin@verizon.com>,
Huaisheng Ye <yehs1@lenovo.com>,
Mike Rapoport <rppt@linux.vnet.ibm.com>,
linux-arm-kernel@lists.infradead.org,
iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, Yong Wu <yong.wu@mediatek.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
Tomasz Figa <tfiga@google.com>,
yingjoe.chen@mediatek.com
Subject: [PATCH RFC 2/3] include/linux/gfp.h: Add __get_dma32_pages macro
Date: Fri, 9 Nov 2018 16:24:47 +0800 [thread overview]
Message-ID: <20181109082448.150302-3-drinkcat@chromium.org> (raw)
In-Reply-To: <20181109082448.150302-1-drinkcat@chromium.org>
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(+)
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
next prev parent reply other threads:[~2018-11-09 8:25 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-09 8:24 [PATCH RFC 0/3] iommu/io-pgtable-arm-v7s: Use DMA32 zone for page tables Nicolas Boichat
2018-11-09 8:24 ` [PATCH RFC 1/3] mm: When CONFIG_ZONE_DMA32 is set, use DMA32 for SLAB_CACHE_DMA Nicolas Boichat
2018-11-09 10:43 ` Vlastimil Babka
2018-11-09 11:57 ` Nicolas Boichat
2018-11-09 12:14 ` Vlastimil Babka
2018-11-09 8:24 ` Nicolas Boichat [this message]
2018-11-09 8:24 ` [PATCH RFC 3/3] iommu/io-pgtable-arm-v7s: Request DMA32 memory, and improve debugging Nicolas Boichat
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