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Message-ID: <20160531212711.28908.22342.stgit@bhelgaas-glaptop2.roam.corp.google.com>
Date: Tue, 31 May 2016 16:27:11 -0500
From: Bjorn Helgaas <bhelgaas@...gle.com>
To: Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>, x86@...nel.org,
"H. Peter Anvin" <hpa@...or.com>
Cc: Max Filippov <jcmvbkbc@...il.com>,
Andrew Morton <akpm@...ux-foundation.org>,
linux-kernel@...r.kernel.org, Guenter Roeck <linux@...ck-us.net>,
Valentin Rothberg <valentinrothberg@...il.com>
Subject: [PATCH] dma-mapping: Simplify get_dma_ops() control flow
Simplify code flow of get_dma_ops() by getting rid of several negations.
No functional change intended.
Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.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);
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