[PATCH v3 20/26] xdp: Convert to netmem

From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
To: Jesper Dangaard Brouer <hawk@kernel.org>,
	Ilias Apalodimas <ilias.apalodimas@linaro.org>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>,
	netdev@vger.kernel.org, linux-mm@kvack.org,
	Shakeel Butt <shakeelb@google.com>,
	Jesper Dangaard Brouer <brouer@redhat.com>,
	Jesse Brandeburg <jesse.brandeburg@intel.com>
Subject: [PATCH v3 20/26] xdp: Convert to netmem
Date: Wed, 11 Jan 2023 04:22:08 +0000	[thread overview]
Message-ID: <20230111042214.907030-21-willy@infradead.org> (raw)
In-Reply-To: <20230111042214.907030-1-willy@infradead.org>

We dereference the 'pp' member of struct page, so we must use a netmem
here.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
---
 net/core/xdp.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/net/core/xdp.c b/net/core/xdp.c
index 844c9d99dc0e..7520c3b27356 100644
--- a/net/core/xdp.c
+++ b/net/core/xdp.c
@@ -375,17 +375,18 @@ EXPORT_SYMBOL_GPL(xdp_rxq_info_reg_mem_model);
 void __xdp_return(void *data, struct xdp_mem_info *mem, bool napi_direct,
 		  struct xdp_buff *xdp)
 {
+	struct netmem *nmem;
 	struct page *page;
 
 	switch (mem->type) {
 	case MEM_TYPE_PAGE_POOL:
-		page = virt_to_head_page(data);
+		nmem = virt_to_netmem(data);
 		if (napi_direct && xdp_return_frame_no_direct())
 			napi_direct = false;
-		/* No need to check ((page->pp_magic & ~0x3UL) == PP_SIGNATURE)
+		/* No need to check ((nmem->pp_magic & ~0x3UL) == PP_SIGNATURE)
 		 * as mem->type knows this a page_pool page
 		 */
-		page_pool_put_full_page(page->pp, page, napi_direct);
+		page_pool_put_full_netmem(nmem->pp, nmem, napi_direct);
 		break;
 	case MEM_TYPE_PAGE_SHARED:
 		page_frag_free(data);
-- 
2.35.1

