async_tx: rename zero_sum to val

'zero_sum' does not properly describe the operation of generating parity
and checking that it validates against an existing buffer.  Change the
name of the operation to 'val' (for 'validate').  This is in
anticipation of the p+q case where it is a requirement to identify the
target parity buffers separately from the source buffers, because the
target parity buffers will not have corresponding pq coefficients.

Reviewed-by: Andre Noll <maan@systemlinux.org>
Acked-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 8 insertions, 8 deletions

diff --git a/crypto/async_tx/async_xor.c b/crypto/async_tx/async_xor.c
index 95fe2c8d6c51..e0580b0ea533 100644
--- a/crypto/async_tx/async_xor.c
+++ b/crypto/async_tx/async_xor.c
@@ -222,7 +222,7 @@ static int page_is_zero(struct page *p, unsigned int offset, size_t len)
 }
 
 /**
- * async_xor_zero_sum - attempt a xor parity check with a dma engine.
+ * async_xor_val - attempt a xor parity check with a dma engine.
  * @dest: destination page used if the xor is performed synchronously
  * @src_list: array of source pages.  The dest page must be listed as a source
  * 	at index zero.  The contents of this array may be overwritten.
@@ -236,13 +236,13 @@ static int page_is_zero(struct page *p, unsigned int offset, size_t len)
  * @cb_param: parameter to pass to the callback routine
  */
 struct dma_async_tx_descriptor *
-async_xor_zero_sum(struct page *dest, struct page **src_list,
+async_xor_val(struct page *dest, struct page **src_list,
 	unsigned int offset, int src_cnt, size_t len,
 	u32 *result, enum async_tx_flags flags,
 	struct dma_async_tx_descriptor *depend_tx,
 	dma_async_tx_callback cb_fn, void *cb_param)
 {
-	struct dma_chan *chan = async_tx_find_channel(depend_tx, DMA_ZERO_SUM,
+	struct dma_chan *chan = async_tx_find_channel(depend_tx, DMA_XOR_VAL,
 						      &dest, 1, src_list,
 						      src_cnt, len);
 	struct dma_device *device = chan ? chan->device : NULL;
@@ -261,15 +261,15 @@ async_xor_zero_sum(struct page *dest, struct page **src_list,
 			dma_src[i] = dma_map_page(device->dev, src_list[i],
 						  offset, len, DMA_TO_DEVICE);
 
-		tx = device->device_prep_dma_zero_sum(chan, dma_src, src_cnt,
-						      len, result,
-						      dma_prep_flags);
+		tx = device->device_prep_dma_xor_val(chan, dma_src, src_cnt,
+						     len, result,
+						     dma_prep_flags);
 		if (unlikely(!tx)) {
 			async_tx_quiesce(&depend_tx);
 
 			while (!tx) {
 				dma_async_issue_pending(chan);
-				tx = device->device_prep_dma_zero_sum(chan,
+				tx = device->device_prep_dma_xor_val(chan,
 					dma_src, src_cnt, len, result,
 					dma_prep_flags);
 			}
@@ -296,7 +296,7 @@ async_xor_zero_sum(struct page *dest, struct page **src_list,
 
 	return tx;
 }
-EXPORT_SYMBOL_GPL(async_xor_zero_sum);
+EXPORT_SYMBOL_GPL(async_xor_val);
 
 static int __init async_xor_init(void)
 {