diff options
| -rw-r--r-- | include/linux/dma-mapping.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index 5ea7eec83c0f..94f41846b933 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -776,10 +776,19 @@ static inline void dma_deconfigure(struct device *dev) {} /* * Managed DMA API */ +#ifdef CONFIG_HAS_DMA extern void *dmam_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t gfp); extern void dmam_free_coherent(struct device *dev, size_t size, void *vaddr, dma_addr_t dma_handle); +#else /* !CONFIG_HAS_DMA */ +static inline void *dmam_alloc_coherent(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t gfp) +{ return NULL; } +static inline void dmam_free_coherent(struct device *dev, size_t size, + void *vaddr, dma_addr_t dma_handle) { } +#endif /* !CONFIG_HAS_DMA */ + extern void *dmam_alloc_attrs(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs); |