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authorMauricio Faria de Oliveira <mauricfo@linux.vnet.ibm.com>2016-10-11 23:54:14 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-10-12 01:06:32 +0300
commita9a62c9384417545620aee1b5ad1d9357350c17a (patch)
treedb5086c36bd8cce0665ed4380ea4de88fe16543a /include
parent7425154d3bbf5fcc7554738cab6dfac559ffbdda (diff)
downloadlinux-a9a62c9384417545620aee1b5ad1d9357350c17a.tar.xz
dma-mapping: introduce the DMA_ATTR_NO_WARN attribute
Introduce the DMA_ATTR_NO_WARN attribute, and document it. Link: http://lkml.kernel.org/r/1470092390-25451-2-git-send-email-mauricfo@linux.vnet.ibm.com Signed-off-by: Mauricio Faria de Oliveira <mauricfo@linux.vnet.ibm.com> Cc: Keith Busch <keith.busch@intel.com> Cc: Jens Axboe <axboe@fb.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/dma-mapping.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 0f90eb5e3c6b..08528afdf58b 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -56,6 +56,11 @@
* that gives better TLB efficiency.
*/
#define DMA_ATTR_ALLOC_SINGLE_PAGES (1UL << 7)
+/*
+ * DMA_ATTR_NO_WARN: This tells the DMA-mapping subsystem to suppress
+ * allocation failure reports (similarly to __GFP_NOWARN).
+ */
+#define DMA_ATTR_NO_WARN (1UL << 8)
/*
* A dma_addr_t can hold any valid DMA or bus address for the platform.