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Replace scatterwalk_map_and_copy() with memcpy_from_sglist() in aspeed_ahash_dma_prepare(). The latter provides a simpler interface without requiring a direction parameter, making the code easier to read and less error-prone. No functional change intended. Signed-off-by: Paul Louvel <paul.louvel@bootlin.com> Reviewed-by: Neal Liu <neal_liu@aspeedtech.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>