Merge branch 'net-skb-remove-skb_data_area_size'

Ricardo Martinez says:

====================
net: skb: Remove skb_data_area_size()

This patch series removes the skb_data_area_size() helper,
replacing it in t7xx driver with the size used during skb allocation.

https://lore.kernel.org/netdev/CAHNKnsTmH-rGgWi3jtyC=ktM1DW2W1VJkYoTMJV2Z_Bt498bsg@mail.gmail.com/
====================

Link: https://lore.kernel.org/r/20220513173400.3848271-1-ricardo.martinez@linux.intel.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/wwan/t7xx/t7xx_hif_cldma.c

@@ -97,8 +97,7 @@ static int t7xx_cldma_alloc_and_map_skb(struct cldma_ctrl *md_ctrl, struct cldma
 	if (!req->skb)
 		return -ENOMEM;
 
-	req->mapped_buff = dma_map_single(md_ctrl->dev, req->skb->data,
-					  skb_data_area_size(req->skb), DMA_FROM_DEVICE);
+	req->mapped_buff = dma_map_single(md_ctrl->dev, req->skb->data, size, DMA_FROM_DEVICE);
 	if (dma_mapping_error(md_ctrl->dev, req->mapped_buff)) {
 		dev_kfree_skb_any(req->skb);
 		req->skb = NULL;
@@ -154,7 +153,7 @@ static int t7xx_cldma_gpd_rx_from_q(struct cldma_queue *queue, int budget, bool
 
 		if (req->mapped_buff) {
 			dma_unmap_single(md_ctrl->dev, req->mapped_buff,
-					 skb_data_area_size(skb), DMA_FROM_DEVICE);
+					 queue->tr_ring->pkt_size, DMA_FROM_DEVICE);
 			req->mapped_buff = 0;
 		}
 
@@ -376,7 +375,7 @@ static void t7xx_cldma_ring_free(struct cldma_ctrl *md_ctrl,
 	list_for_each_entry_safe(req_cur, req_next, &ring->gpd_ring, entry) {
 		if (req_cur->mapped_buff && req_cur->skb) {
 			dma_unmap_single(md_ctrl->dev, req_cur->mapped_buff,
-					 skb_data_area_size(req_cur->skb), tx_rx);
+					 ring->pkt_size, tx_rx);
 			req_cur->mapped_buff = 0;
 		}
 

drivers/net/wwan/t7xx/t7xx_hif_dpmaif_rx.c

@@ -151,14 +151,12 @@ static bool t7xx_alloc_and_map_skb_info(const struct dpmaif_ctrl *dpmaif_ctrl,
 {
 	dma_addr_t data_bus_addr;
 	struct sk_buff *skb;
-	size_t data_len;
 
 	skb = __dev_alloc_skb(size, GFP_KERNEL);
 	if (!skb)
 		return false;
 
-	data_len = skb_data_area_size(skb);
-	data_bus_addr = dma_map_single(dpmaif_ctrl->dev, skb->data, data_len, DMA_FROM_DEVICE);
+	data_bus_addr = dma_map_single(dpmaif_ctrl->dev, skb->data, size, DMA_FROM_DEVICE);
 	if (dma_mapping_error(dpmaif_ctrl->dev, data_bus_addr)) {
 		dev_err_ratelimited(dpmaif_ctrl->dev, "DMA mapping error\n");
 		dev_kfree_skb_any(skb);
@@ -167,7 +165,7 @@ static bool t7xx_alloc_and_map_skb_info(const struct dpmaif_ctrl *dpmaif_ctrl,
 
 	cur_skb->skb = skb;
 	cur_skb->data_bus_addr = data_bus_addr;
-	cur_skb->data_len = data_len;
+	cur_skb->data_len = size;
 
 	return true;
 }

include/linux/skbuff.h

@@ -1765,11 +1765,6 @@ static inline void skb_set_end_offset(struct sk_buff *skb, unsigned int offset)
 }
 #endif
 
-static inline unsigned int skb_data_area_size(struct sk_buff *skb)
-{
-	return skb_end_pointer(skb) - skb->data;
-}
-
 struct ubuf_info *msg_zerocopy_realloc(struct sock *sk, size_t size,
 				       struct ubuf_info *uarg);