[PATCH v5 RFC 4/6] page_pool: remove PP_FLAG_PAGE_FRAG flag

[Yunsheng Lin]

PP_FLAG_PAGE_FRAG is not really needed after pp_frag_count
handling is unified and page_pool_alloc_frag() is supported
in 32-bit arch with 64-bit DMA, so remove it.

Signed-off-by: Yunsheng Lin <linyunsheng at huawei.com>
CC: Lorenzo Bianconi <lorenzo at kernel.org>
CC: Alexander Duyck <alexander.duyck at gmail.com>
CC: Liang Chen <liangchen.linux at gmail.com>
CC: Alexander Lobakin <aleksander.lobakin at intel.com>
---
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c          | 3 +--
 drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c | 2 +-
 drivers/net/ethernet/mellanox/mlx5/core/en_main.c        | 2 +-
 drivers/net/wireless/mediatek/mt76/mac80211.c            | 2 +-
 include/net/page_pool.h                                  | 7 ++-----
 net/core/skbuff.c                                        | 2 +-
 6 files changed, 7 insertions(+), 11 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
index b676496ec6d7..4e613d5bf1fd 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
@@ -4925,8 +4925,7 @@ static void hns3_put_ring_config(struct hns3_nic_priv *priv)
 static void hns3_alloc_page_pool(struct hns3_enet_ring *ring)
 {
 	struct page_pool_params pp_params = {
-		.flags = PP_FLAG_DMA_MAP | PP_FLAG_PAGE_FRAG |
-				PP_FLAG_DMA_SYNC_DEV,
+		.flags = PP_FLAG_DMA_MAP | PP_FLAG_DMA_SYNC_DEV,
 		.order = hns3_page_order(ring),
 		.pool_size = ring->desc_num * hns3_buf_size(ring) /
 				(PAGE_SIZE << hns3_page_order(ring)),
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c
index a79cb680bb23..404caec467af 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c
@@ -1426,7 +1426,7 @@ int otx2_pool_init(struct otx2_nic *pfvf, u16 pool_id,
 		return 0;
 	}
 
-	pp_params.flags = PP_FLAG_PAGE_FRAG | PP_FLAG_DMA_MAP;
+	pp_params.flags = PP_FLAG_DMA_MAP;
 	pp_params.pool_size = numptrs;
 	pp_params.nid = NUMA_NO_NODE;
 	pp_params.dev = pfvf->dev;
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index 42ccb77a1b6c..cdd00848c0cb 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -843,7 +843,7 @@ static int mlx5e_alloc_rq(struct mlx5e_params *params,
 		}
 
 		pp_params.order     = 0;
-		pp_params.flags     = PP_FLAG_DMA_MAP | PP_FLAG_DMA_SYNC_DEV | PP_FLAG_PAGE_FRAG;
+		pp_params.flags     = PP_FLAG_DMA_MAP | PP_FLAG_DMA_SYNC_DEV;
 		pp_params.pool_size = pool_size;
 		pp_params.nid       = node;
 		pp_params.dev       = rq->pdev;
diff --git a/drivers/net/wireless/mediatek/mt76/mac80211.c b/drivers/net/wireless/mediatek/mt76/mac80211.c
index 467afef98ba2..ee72869e5572 100644
--- a/drivers/net/wireless/mediatek/mt76/mac80211.c
+++ b/drivers/net/wireless/mediatek/mt76/mac80211.c
@@ -566,7 +566,7 @@ int mt76_create_page_pool(struct mt76_dev *dev, struct mt76_queue *q)
 {
 	struct page_pool_params pp_params = {
 		.order = 0,
-		.flags = PP_FLAG_PAGE_FRAG,
+		.flags = 0,
 		.nid = NUMA_NO_NODE,
 		.dev = dev->dma_dev,
 	};
diff --git a/include/net/page_pool.h b/include/net/page_pool.h
index 53486ef9074d..e9fb95d62ed5 100644
--- a/include/net/page_pool.h
+++ b/include/net/page_pool.h
@@ -45,10 +45,8 @@
 					* Please note DMA-sync-for-CPU is still
 					* device driver responsibility
 					*/
-#define PP_FLAG_PAGE_FRAG	BIT(2) /* for page frag feature */
 #define PP_FLAG_ALL		(PP_FLAG_DMA_MAP |\
-				 PP_FLAG_DMA_SYNC_DEV |\
-				 PP_FLAG_PAGE_FRAG)
+				 PP_FLAG_DMA_SYNC_DEV)
 
 #define PAGE_POOL_DMA_USE_PP_FRAG_COUNT	\
 		(sizeof(dma_addr_t) > sizeof(unsigned long))
@@ -234,8 +232,7 @@ static inline struct page *page_pool_alloc_frag(struct page_pool *pool,
 
 	size = ALIGN(size, dma_get_cache_alignment());
 
-	if (WARN_ON(!(pool->p.flags & PP_FLAG_PAGE_FRAG) ||
-		    size > max_size))
+	if (WARN_ON(size > max_size))
 		return NULL;
 
 	/* Don't allow page splitting and allocate one big frag
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 7c4338221b17..ca2316cc1e7e 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -5652,7 +5652,7 @@ bool skb_try_coalesce(struct sk_buff *to, struct sk_buff *from,
 	/* In general, avoid mixing page_pool and non-page_pool allocated
 	 * pages within the same SKB. Additionally avoid dealing with clones
 	 * with page_pool pages, in case the SKB is using page_pool fragment
-	 * references (PP_FLAG_PAGE_FRAG). Since we only take full page
+	 * references (page_pool_alloc_frag()). Since we only take full page
 	 * references for cloned SKBs at the moment that would result in
 	 * inconsistent reference counts.
 	 * In theory we could take full references if @from is cloned and
-- 
2.33.0