* [PATCH] dma-mapping: Simplify get_dma_ops() control flow
@ 2016-05-31 21:27 Bjorn Helgaas
2016-06-01 7:55 ` Christoph Hellwig
0 siblings, 1 reply; 2+ messages in thread
From: Bjorn Helgaas @ 2016-05-31 21:27 UTC (permalink / raw)
To: Thomas Gleixner, Ingo Molnar, x86, H. Peter Anvin
Cc: Max Filippov, Andrew Morton, linux-kernel, Guenter Roeck,
Valentin Rothberg
Simplify code flow of get_dma_ops() by getting rid of several negations.
No functional change intended.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
arch/x86/include/asm/dma-mapping.h | 9 +++------
1 file changed, 3 insertions(+), 6 deletions(-)
diff --git a/arch/x86/include/asm/dma-mapping.h b/arch/x86/include/asm/dma-mapping.h
index 3a27b93..96db8ea 100644
--- a/arch/x86/include/asm/dma-mapping.h
+++ b/arch/x86/include/asm/dma-mapping.h
@@ -30,14 +30,11 @@ extern struct dma_map_ops *dma_ops;
static inline struct dma_map_ops *get_dma_ops(struct device *dev)
{
-#ifndef CONFIG_X86_DEV_DMA_OPS
- return dma_ops;
-#else
- if (unlikely(!dev) || !dev->archdata.dma_ops)
- return dma_ops;
- else
+#ifdef CONFIG_X86_DEV_DMA_OPS
+ if (likely(dev) && dev->archdata.dma_ops)
return dev->archdata.dma_ops;
#endif
+ return dma_ops;
}
bool arch_dma_alloc_attrs(struct device **dev, gfp_t *gfp);
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] dma-mapping: Simplify get_dma_ops() control flow
2016-05-31 21:27 [PATCH] dma-mapping: Simplify get_dma_ops() control flow Bjorn Helgaas
@ 2016-06-01 7:55 ` Christoph Hellwig
0 siblings, 0 replies; 2+ messages in thread
From: Christoph Hellwig @ 2016-06-01 7:55 UTC (permalink / raw)
To: Bjorn Helgaas
Cc: Thomas Gleixner, Ingo Molnar, x86, H. Peter Anvin, Max Filippov,
Andrew Morton, linux-kernel, Guenter Roeck, Valentin Rothberg
Looks fine,
Reviewed-by: Christoph Hellwig <hch@lst.de>
^ permalink raw reply [flat|nested] 2+ messages in thread
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2016-05-31 21:27 [PATCH] dma-mapping: Simplify get_dma_ops() control flow Bjorn Helgaas
2016-06-01 7:55 ` Christoph Hellwig
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