netdev - [net-next v4 03/11] page_pool: Allocate and free stats structure

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Date:   Thu,  3 Feb 2022 16:09:25 -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,
        saeed@...nel.org, ttoukan.linux@...il.com, brouer@...hat.com
Cc:     Joe Damato <jdamato@...tly.com>
Subject: [net-next v4 03/11] page_pool: Allocate and free stats structure

This commit only alloc_percpu and free_percpu for the stats
structure.

Signed-off-by: Joe Damato <jdamato@...tly.com>
---
 net/core/page_pool.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/net/core/page_pool.c b/net/core/page_pool.c
index bd62c01..5f822b0 100644
--- a/net/core/page_pool.c
+++ b/net/core/page_pool.c
@@ -73,6 +73,12 @@ static int page_pool_init(struct page_pool *pool,
 	    pool->p.flags & PP_FLAG_PAGE_FRAG)
 		return -EINVAL;
 
+#ifdef CONFIG_PAGE_POOL_STATS
+	pool->stats = alloc_percpu(struct page_pool_stats);
+	if (!pool->stats)
+		return -ENOMEM;
+#endif
+
 	if (ptr_ring_init(&pool->ring, ring_qsize, GFP_KERNEL) < 0)
 		return -ENOMEM;
 
@@ -623,6 +629,9 @@ static void page_pool_free(struct page_pool *pool)
 	if (pool->p.flags & PP_FLAG_DMA_MAP)
 		put_device(pool->p.dev);
 
+#ifdef CONFIG_PAGE_POOL_STATS
+	free_percpu(pool->stats);
+#endif
 	kfree(pool);
 }
 
-- 
2.7.4