iio: buffer-dma: Use round_down() instead of rounddown()

We know that the buffer's alignment will always be a power of two;
therefore, we can use the faster round_down() macro.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Reviewed-by: Alexandru Ardelean <ardeleanalex@gmail.com>
Link: https://lore.kernel.org/r/20211115141925.60164-4-paul@crapouillou.net
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/buffer/industrialio-buffer-dmaengine.c b/drivers/iio/buffer/industrialio-buffer-dmaengine.c
index 1ac94c4..f8ce26a 100644 (file)
--- a/drivers/iio/buffer/industrialio-buffer-dmaengine.c
+++ b/drivers/iio/buffer/industrialio-buffer-dmaengine.c
@@ -67,7 +67,7 @@ static int iio_dmaengine_buffer_submit_block(struct iio_dma_buffer_queue *queue,
        dma_cookie_t cookie;
 
        block->bytes_used = min(block->size, dmaengine_buffer->max_size);
-       block->bytes_used = rounddown(block->bytes_used,
+       block->bytes_used = round_down(block->bytes_used,
                        dmaengine_buffer->align);
 
        desc = dmaengine_prep_slave_single(dmaengine_buffer->chan,