+++ /dev/null
-From: Qingfang DENG <qingfang.deng@siflower.com.cn>
-Date: Fri, 3 Feb 2023 09:16:11 +0800
-Subject: [PATCH] net: page_pool: use in_softirq() instead
-
-We use BH context only for synchronization, so we don't care if it's
-actually serving softirq or not.
-
-As a side node, in case of threaded NAPI, in_serving_softirq() will
-return false because it's in process context with BH off, making
-page_pool_recycle_in_cache() unreachable.
-
-Signed-off-by: Qingfang DENG <qingfang.deng@siflower.com.cn>
----
-
---- a/include/net/page_pool.h
-+++ b/include/net/page_pool.h
-@@ -386,7 +386,7 @@ static inline void page_pool_nid_changed
- static inline void page_pool_ring_lock(struct page_pool *pool)
- __acquires(&pool->ring.producer_lock)
- {
-- if (in_serving_softirq())
-+ if (in_softirq())
- spin_lock(&pool->ring.producer_lock);
- else
- spin_lock_bh(&pool->ring.producer_lock);
-@@ -395,7 +395,7 @@ static inline void page_pool_ring_lock(s
- static inline void page_pool_ring_unlock(struct page_pool *pool)
- __releases(&pool->ring.producer_lock)
- {
-- if (in_serving_softirq())
-+ if (in_softirq())
- spin_unlock(&pool->ring.producer_lock);
- else
- spin_unlock_bh(&pool->ring.producer_lock);
---- a/net/core/page_pool.c
-+++ b/net/core/page_pool.c
-@@ -511,8 +511,8 @@ static void page_pool_return_page(struct
- static bool page_pool_recycle_in_ring(struct page_pool *pool, struct page *page)
- {
- int ret;
-- /* BH protection not needed if current is serving softirq */
-- if (in_serving_softirq())
-+ /* BH protection not needed if current is softirq */
-+ if (in_softirq())
- ret = ptr_ring_produce(&pool->ring, page);
- else
- ret = ptr_ring_produce_bh(&pool->ring, page);
-@@ -570,7 +570,7 @@ __page_pool_put_page(struct page_pool *p
- page_pool_dma_sync_for_device(pool, page,
- dma_sync_size);
-
-- if (allow_direct && in_serving_softirq() &&
-+ if (allow_direct && in_softirq() &&
- page_pool_recycle_in_cache(page, pool))
- return NULL;
-
*/
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
-@@ -3022,6 +3022,10 @@ static inline int pskb_trim(struct sk_bu
+@@ -3032,6 +3032,10 @@ static inline int pskb_trim(struct sk_bu
return (len < skb->len) ? __pskb_trim(skb, len) : 0;
}
/**
* pskb_trim_unique - remove end from a paged unique (not cloned) buffer
* @skb: buffer to alter
-@@ -3171,16 +3175,6 @@ static inline struct sk_buff *dev_alloc_
+@@ -3181,16 +3185,6 @@ static inline struct sk_buff *dev_alloc_
}