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 <[email protected]> --- This is a resend of a patch from Dec 2020 when I tried to do it tree-wide. Now start with the actual change, drivers can be changed afterwards, maybe per subsystem. --- include/linux/dma-mapping.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index e9d19b974..183e7103a 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -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; } -- 2.31.0 _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
