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-rw-r--r--include/linux/dma-noncoherent.h5
1 files changed, 4 insertions, 1 deletions
diff --git a/include/linux/dma-noncoherent.h b/include/linux/dma-noncoherent.h
index 306557331d7d..69b36ed31a99 100644
--- a/include/linux/dma-noncoherent.h
+++ b/include/linux/dma-noncoherent.h
@@ -38,7 +38,10 @@ pgprot_t arch_dma_mmap_pgprot(struct device *dev, pgprot_t prot,
void arch_dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction direction);
#else
-#define arch_dma_cache_sync NULL
+static inline void arch_dma_cache_sync(struct device *dev, void *vaddr,
+ size_t size, enum dma_data_direction direction)
+{
+}
#endif /* CONFIG_DMA_NONCOHERENT_CACHE_SYNC */
#ifdef CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE