netdev - [net-next v2 02/10] page_pool: Add per-cpu page_pool

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Date:   Sat, 29 Jan 2022 15:38:52 -0800
From:   Joe Damato <jdamato@...tly.com>
To:     netdev@...r.kernel.org, kuba@...nel.org,
        ilias.apalodimas@...aro.org, davem@...emloft.net, hawk@...nel.org
Cc:     Joe Damato <jdamato@...tly.com>
Subject: [net-next v2 02/10] page_pool: Add per-cpu page_pool_stats struct

A per-cpu (empty) page_pool_stats struct has been added as a place holder.

Signed-off-by: Joe Damato <jdamato@...tly.com>
---
 include/net/page_pool.h | 10 ++++++++++
 net/core/page_pool.c    |  5 +++++
 2 files changed, 15 insertions(+)

diff --git a/include/net/page_pool.h b/include/net/page_pool.h
index 79a8055..dae65f2 100644
--- a/include/net/page_pool.h
+++ b/include/net/page_pool.h
@@ -137,6 +137,16 @@ struct page_pool {
 	u64 destroy_cnt;
 };
 
+#ifdef CONFIG_PAGE_POOL_STATS
+/*
+ * stats for tracking page_pool events.
+ */
+struct page_pool_stats {
+};
+
+DECLARE_PER_CPU_ALIGNED(struct page_pool_stats, page_pool_stats);
+#endif
+
 struct page *page_pool_alloc_pages(struct page_pool *pool, gfp_t gfp);
 
 static inline struct page *page_pool_dev_alloc_pages(struct page_pool *pool)
diff --git a/net/core/page_pool.c b/net/core/page_pool.c
index bd62c01..7e33590 100644
--- a/net/core/page_pool.c
+++ b/net/core/page_pool.c
@@ -26,6 +26,11 @@
 
 #define BIAS_MAX	LONG_MAX
 
+#ifdef CONFIG_PAGE_POOL_STATS
+DEFINE_PER_CPU_ALIGNED(struct page_pool_stats, page_pool_stats);
+EXPORT_PER_CPU_SYMBOL(page_pool_stats);
+#endif
+
 static int page_pool_init(struct page_pool *pool,
 			  const struct page_pool_params *params)
 {
-- 
2.7.4