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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2008-09-30 11:30:24 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2008-09-30 11:30:53 +0100
commit7807c6098a716567fe408775c1c1999467088305 (patch)
tree0d8a6285084e61904ce5bd7de2f1b148c9ada47f /arch/arm/include/asm
parent309dbbabee7b19e003e1ba4b98f43d28f390a84e (diff)
[ARM] dma: fix some comments in dma-mapping.h
... to prevent people being mislead. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/include/asm')
-rw-r--r--arch/arm/include/asm/dma-mapping.h15
1 files changed, 7 insertions, 8 deletions
diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h
index ad62020763f..1cb8602dd9d 100644
--- a/arch/arm/include/asm/dma-mapping.h
+++ b/arch/arm/include/asm/dma-mapping.h
@@ -297,8 +297,7 @@ static inline dma_addr_t dma_map_single(struct device *dev, void *cpu_addr,
* or written back.
*
* The device owns this memory once this call has completed. The CPU
- * can regain ownership by calling dma_unmap_page() or
- * dma_sync_single_for_cpu().
+ * can regain ownership by calling dma_unmap_page().
*/
static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size, enum dma_data_direction dir)
@@ -315,8 +314,8 @@ static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
* dma_unmap_single - unmap a single buffer previously mapped
* @dev: valid struct device pointer, or NULL for ISA and EISA-like devices
* @handle: DMA address of buffer
- * @size: size of buffer to map
- * @dir: DMA transfer direction
+ * @size: size of buffer (same as passed to dma_map_single)
+ * @dir: DMA transfer direction (same as passed to dma_map_single)
*
* Unmap a single streaming mode DMA translation. The handle and size
* must match what was provided in the previous dma_map_single() call.
@@ -336,11 +335,11 @@ static inline void dma_unmap_single(struct device *dev, dma_addr_t handle,
* dma_unmap_page - unmap a buffer previously mapped through dma_map_page()
* @dev: valid struct device pointer, or NULL for ISA and EISA-like devices
* @handle: DMA address of buffer
- * @size: size of buffer to map
- * @dir: DMA transfer direction
+ * @size: size of buffer (same as passed to dma_map_page)
+ * @dir: DMA transfer direction (same as passed to dma_map_page)
*
- * Unmap a single streaming mode DMA translation. The handle and size
- * must match what was provided in the previous dma_map_single() call.
+ * Unmap a page streaming mode DMA translation. The handle and size
+ * must match what was provided in the previous dma_map_page() call.
* All other usages are undefined.
*
* After this call, reads by the CPU to the buffer are guaranteed to see