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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 /arch/sparc
parent190d4e5916a2d70a11009022b968fca948fb5dc7 (diff)
downloadlinux-356da6d0cde3323236977fce54c1f9612a742036.tar.bz2
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 'arch/sparc')
-rw-r--r--arch/sparc/include/asm/dma-mapping.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/sparc/include/asm/dma-mapping.h b/arch/sparc/include/asm/dma-mapping.h
index 55a44f08a9a4..ed32845bd2d2 100644
--- a/arch/sparc/include/asm/dma-mapping.h
+++ b/arch/sparc/include/asm/dma-mapping.h
@@ -12,11 +12,11 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
{
#ifdef CONFIG_SPARC_LEON
if (sparc_cpu_model == sparc_leon)
- return &dma_direct_ops;
+ return NULL;
#endif
#if defined(CONFIG_SPARC32) && defined(CONFIG_PCI)
if (bus == &pci_bus_type)
- return &dma_direct_ops;
+ return NULL;
#endif
return dma_ops;
}