arm-nommu: remove the partial DMA_ATTR_NON_CONSISTENT support

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The arm-nommu DMA code supports DMA_ATTR_NON_CONSISTENT allocations, but
does not provide a cache_sync operation.  This means any user of it
will never be able to actually transfer cache ownership and thus cause
coherency bugs.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Vladimir Murzin <vladimir.murzin@arm.com>

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Christoph Hellwig 2019-06-03 12:48:57 +02:00

parent ab746573c4

commit 34ab03160e

1 changed files with 3 additions and 21 deletions

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arch/arm/mm/dma-mapping-nommu.c

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