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dma-mapping: update comment after dmabounce removal

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Commit e3217540c2 ("ARM/dma-mapping: remove dmabounce") removes the
config DMABOUNCE. A comment to the function __dma_page_cpu_to_dev() refers
to this removed config DMABOUNCE.

Remove the obsolete explanation, but keep the recommendation not to use
__dma_page_cpu_to_dev() and use dma_sync_* functions instead.

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Lukas Bulwahn
2022-07-20 21:02:08 +02:00
committed by Christoph Hellwig
parent c9337ad439
commit a45e52bf1e
1 changed files with 1 additions and 2 deletions
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3
arch/arm/mm/dma-mapping.c
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@@ -679,8 +679,7 @@ static void dma_cache_maint_page(struct page *page, unsigned long offset,
/*
* Make an area consistent for devices.
* Note: Drivers should NOT use this function directly, as it will break
* platforms with CONFIG_DMABOUNCE.
* Note: Drivers should NOT use this function directly.
* Use the driver DMA support - see dma-mapping.h (dma_sync_*)
*/
static void __dma_page_cpu_to_dev(struct page *page, unsigned long off,