diff options
| -rw-r--r-- | arch/arm/mm/consistent.c | 3 | ||||
| -rw-r--r-- | include/asm-arm/dma-mapping.h | 4 |
2 files changed, 7 insertions, 0 deletions
diff --git a/arch/arm/mm/consistent.c b/arch/arm/mm/consistent.c index 50e6b6bfb2e231..b797217e82be0e 100644 --- a/arch/arm/mm/consistent.c +++ b/arch/arm/mm/consistent.c @@ -476,6 +476,9 @@ core_initcall(consistent_init); /* * Make an area consistent for devices. + * Note: Drivers should NOT use this function directly, as it will break + * platforms with CONFIG_DMABOUNCE. + * Use the driver DMA support - see dma-mapping.h (dma_sync_*) */ void consistent_sync(void *vaddr, size_t size, int direction) { diff --git a/include/asm-arm/dma-mapping.h b/include/asm-arm/dma-mapping.h index 55eb4dc3253ddf..666617711c81d2 100644 --- a/include/asm-arm/dma-mapping.h +++ b/include/asm-arm/dma-mapping.h @@ -12,6 +12,10 @@ * uncached, unwrite-buffered mapped memory space for use with DMA * devices. This is the "generic" version. The PCI specific version * is in pci.h + * + * Note: Drivers should NOT use this function directly, as it will break + * platforms with CONFIG_DMABOUNCE. + * Use the driver DMA support - see dma-mapping.h (dma_sync_*) */ extern void consistent_sync(void *kaddr, size_t size, int rw); |