netdev - [PATCH v3 06/26] page_pool: Convert page_pool_return_page() to page_pool_return

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Date:   Wed, 11 Jan 2023 04:21:54 +0000
From:   "Matthew Wilcox (Oracle)" <willy@...radead.org>
To:     Jesper Dangaard Brouer <hawk@...nel.org>,
        Ilias Apalodimas <ilias.apalodimas@...aro.org>
Cc:     "Matthew Wilcox (Oracle)" <willy@...radead.org>,
        netdev@...r.kernel.org, linux-mm@...ck.org,
        Shakeel Butt <shakeelb@...gle.com>,
        Jesper Dangaard Brouer <brouer@...hat.com>,
        Jesse Brandeburg <jesse.brandeburg@...el.com>
Subject: [PATCH v3 06/26] page_pool: Convert page_pool_return_page() to page_pool_return_netmem()

Removes a call to compound_head(), saving 464 bytes of kernel text
as page_pool_return_page() is inlined seven times.

Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>
Acked-by: Jesper Dangaard Brouer <brouer@...hat.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@...aro.org>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@...el.com>
---
 net/core/page_pool.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/net/core/page_pool.c b/net/core/page_pool.c
index 4e985502c569..b606952773a6 100644
--- a/net/core/page_pool.c
+++ b/net/core/page_pool.c
@@ -220,7 +220,13 @@ struct page_pool *page_pool_create(const struct page_pool_params *params)
 }
 EXPORT_SYMBOL(page_pool_create);
 
-static void page_pool_return_page(struct page_pool *pool, struct page *page);
+static void page_pool_return_netmem(struct page_pool *pool, struct netmem *nm);
+
+static inline
+void page_pool_return_page(struct page_pool *pool, struct page *page)
+{
+	page_pool_return_netmem(pool, page_netmem(page));
+}
 
 noinline
 static struct page *page_pool_refill_alloc_cache(struct page_pool *pool)
@@ -499,11 +505,11 @@ void page_pool_release_netmem(struct page_pool *pool, struct netmem *nmem)
 EXPORT_SYMBOL(page_pool_release_netmem);
 
 /* Return a page to the page allocator, cleaning up our state */
-static void page_pool_return_page(struct page_pool *pool, struct page *page)
+static void page_pool_return_netmem(struct page_pool *pool, struct netmem *nmem)
 {
-	page_pool_release_page(pool, page);
+	page_pool_release_netmem(pool, nmem);
 
-	put_page(page);
+	netmem_put(nmem);
 	/* An optimization would be to call __free_pages(page, pool->p.order)
 	 * knowing page is not part of page-cache (thus avoiding a
 	 * __page_cache_release() call).
-- 
2.35.1