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| author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2008-09-30 11:30:24 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2008-09-30 11:30:53 +0100 |
| commit | 7807c6098a716567fe408775c1c1999467088305 (patch) | |
| tree | 0d8a6285084e61904ce5bd7de2f1b148c9ada47f /arch | |
| parent | 309dbbabee7b19e003e1ba4b98f43d28f390a84e (diff) | |
| download | lwn-7807c6098a716567fe408775c1c1999467088305.tar.gz lwn-7807c6098a716567fe408775c1c1999467088305.zip | |
[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')
| -rw-r--r-- | arch/arm/include/asm/dma-mapping.h | 15 |
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 ad62020763f1..1cb8602dd9d5 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 |