Re: [PATCH 2/2] dma: remove unsupported gfp_mask parameter from dma_alloc_from_contiguous()

[Vlastimil Babka]

On 07/09/2018 02:19 PM, Marek Szyprowski wrote:
> 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 dd65a941f6ba ("arm64:
> dma-mapping: clear buffers allocated with FORCE_CONTIGUOUS flag").
> 
> Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>

Acked-by: Vlastimil Babka <vbabka@xxxxxxx>