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authorChristoph Hellwig <hch@lst.de>2018-12-06 13:39:32 -0800
committerChristoph Hellwig <hch@lst.de>2018-12-13 21:06:18 +0100
commit356da6d0cde3323236977fce54c1f9612a742036 (patch)
tree87ad8176833266fbaa038780d67aebcc490d0d64 /include/asm-generic/dma-mapping.h
parentvmd: use the proper dma_* APIs instead of direct methods calls (diff)
downloadlinux-dev-356da6d0cde3323236977fce54c1f9612a742036.tar.xz
linux-dev-356da6d0cde3323236977fce54c1f9612a742036.zip
dma-mapping: bypass indirect calls for dma-direct
Avoid expensive indirect calls in the fast path DMA mapping operations by directly calling the dma_direct_* ops if we are using the directly mapped DMA operations. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Jesper Dangaard Brouer <brouer@redhat.com> Tested-by: Jesper Dangaard Brouer <brouer@redhat.com> Tested-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to '')
-rw-r--r--include/asm-generic/dma-mapping.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/asm-generic/dma-mapping.h b/include/asm-generic/dma-mapping.h
index 880a292d792f..c13f46109e88 100644
--- a/include/asm-generic/dma-mapping.h
+++ b/include/asm-generic/dma-mapping.h
@@ -4,7 +4,7 @@
static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
{
- return &dma_direct_ops;
+ return NULL;
}
#endif /* _ASM_GENERIC_DMA_MAPPING_H */