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linux/kernel/dma
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Marek Szyprowski d834c5ab83 kernel/dma: remove unsupported gfp_mask parameter from dma_alloc_from_contiguous() 
The CMA memory allocator doesn't support standard gfp flags for memory
allocation, so there is no point having it as a parameter for
dma_alloc_from_contiguous() function.  Replace it by a boolean no_warn
argument, which covers all the underlaying cma_alloc() function
supports.

This will help to avoid giving false feeling that this function supports
standard gfp flags and callers can pass __GFP_ZERO to get zeroed buffer,
what has already been an issue: see commit dd65a941f6 ("arm64:
dma-mapping: clear buffers allocated with FORCE_CONTIGUOUS flag").

Link: http://lkml.kernel.org/r/20180709122020eucas1p21a71b092975cb4a3b9954ffc63f699d1~-sqUFoa-h2939329393eucas1p2Y@eucas1p2.samsung.com
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Michał Nazarewicz <mina86@mina86.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Laura Abbott <labbott@redhat.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Joonsoo Kim <js1304@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-08-17 16:20:32 -07:00
..
coherent.c dma-mapping: move all DMA mapping code to kernel/dma 2018-06-14 08:50:37 +02:00
contiguous.c kernel/dma: remove unsupported gfp_mask parameter from dma_alloc_from_contiguous() 2018-08-17 16:20:32 -07:00
debug.c dma-mapping: move all DMA mapping code to kernel/dma 2018-06-14 08:50:37 +02:00
direct.c kernel/dma: remove unsupported gfp_mask parameter from dma_alloc_from_contiguous() 2018-08-17 16:20:32 -07:00
Kconfig dma-mapping: move all DMA mapping code to kernel/dma 2018-06-14 08:50:37 +02:00
Makefile dma-mapping: move all DMA mapping code to kernel/dma 2018-06-14 08:50:37 +02:00
mapping.c dma-mapping: move all DMA mapping code to kernel/dma 2018-06-14 08:50:37 +02:00
noncoherent.c dma-noncoherent: add a arch_sync_dma_for_cpu_all hook 2018-06-24 09:27:27 -07:00
swiotlb.c swiotlb: clean up reporting 2018-07-25 13:33:05 +02:00
virt.c dma-mapping: move all DMA mapping code to kernel/dma 2018-06-14 08:50:37 +02:00