openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

dma-mapping: add unlikely hint to error path in dma_mapping_error 

Zillions of drivers use the unlikely() hint when checking the result of
dma_mapping_error(). This is an inline function anyway, so we can move
the hint into the function and remove it from drivers over time.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Heiner Kallweit 2021-03-26 22:03:05 +01:00 committed by Christoph Hellwig
parent ca947482b0
commit a7f3d3d360
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/linux/dma-mapping.h
View File

@ -95,7 +95,7 @@ static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
debug_dma_mapping_error(dev, dma_addr);
if (dma_addr == DMA_MAPPING_ERROR)
if (unlikely(dma_addr == DMA_MAPPING_ERROR))
return -ENOMEM;
return 0;
}