On 2/15/2022 4:44 AM, Vinod Koul wrote:
On 28-01-22, 11:39, Ben Walker wrote:
Document this function to make clear the expected behavior of the
'value' parameter. It was intended to match the behavior of POSIX memset
as laid out here:
https://lore.kernel.org/dmaengine/YejrA5ZWZ3lTRO%2F1@matsya/
Can we add this to Documentation too? Documentation/driver-api/dmaengine/
Ack. Updated in my v2.
Signed-off-by: Ben Walker <benjamin.walker@xxxxxxxxx>
---
include/linux/dmaengine.h | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index 842d4f7ca752d..3d3e663e17ac7 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -1031,6 +1031,14 @@ static inline struct dma_async_tx_descriptor *dmaengine_prep_interleaved_dma(
return chan->device->device_prep_interleaved_dma(chan, xt, flags);
}
+/**
+ * dmaengine_prep_dma_memset() - Prepare a DMA memset descriptor.
+ * @chan: The channel to be used for this descriptor
+ * @dest: Address of buffer to be set
+ * @value: Treated as a single byte value that fills the destination buffer
+ * @len: The total size of dest
+ * @flags: DMA engine flags
+ */
static inline struct dma_async_tx_descriptor *dmaengine_prep_dma_memset(
struct dma_chan *chan, dma_addr_t dest, int value, size_t len,
unsigned long flags)
--
2.33.1
