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dma-mapping: remove dma_zalloc_coherent()
dma_zalloc_coherent() is no longer needed as it has no users because dma_alloc_coherent() already zeroes out memory for us. The Coccinelle grammar rule that used to check for dma_alloc_coherent() + memset() is modified so that it just tells the user that the memset is not needed anymore. Suggested-by: Christoph Hellwig <[email protected]> Signed-off-by: Luis Chamberlain <[email protected]> Signed-off-by: Christoph Hellwig <[email protected]>
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