netdev - [RFC net-next v1 1/6] net: move pp_page_to

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Message-ID: <a85b5aeab5f011742657a9caae22da5bcdcf91b1.1754929026.git.asml.silence@gmail.com>
Date: Mon, 11 Aug 2025 17:29:38 +0100
From: Pavel Begunkov <asml.silence@...il.com>
To: netdev@...r.kernel.org
Cc: Jakub Kicinski <kuba@...nel.org>,
	Eric Dumazet <edumazet@...gle.com>,
	Paolo Abeni <pabeni@...hat.com>,
	davem@...emloft.net,
	sdf@...ichev.me,
	almasrymina@...gle.com,
	dw@...idwei.uk,
	Jesper Dangaard Brouer <hawk@...nel.org>,
	Ilias Apalodimas <ilias.apalodimas@...aro.org>,
	Byungchul Park <byungchul@...com>,
	asml.silence@...il.com
Subject: [RFC net-next v1 1/6] net: move pp_page_to_nmdesc()

A preparation patch moving pp_page_to_nmdesc() up in the header file and
no other changes otherwise. It reduces cluttering from the following
patch.

Signed-off-by: Pavel Begunkov <asml.silence@...il.com>
---
 include/net/netmem.h | 34 +++++++++++++++++-----------------
 1 file changed, 17 insertions(+), 17 deletions(-)

diff --git a/include/net/netmem.h b/include/net/netmem.h
index f7dacc9e75fd..8b639e45cfe2 100644
--- a/include/net/netmem.h
+++ b/include/net/netmem.h
@@ -217,6 +217,23 @@ static inline netmem_ref net_iov_to_netmem(struct net_iov *niov)
 	const struct page * :	(__force const netmem_ref)(p),	\
 	struct page * :		(__force netmem_ref)(p)))
 
+/* XXX: How to extract netmem_desc from page must be changed, once
+ * netmem_desc no longer overlays on page and will be allocated through
+ * slab.
+ */
+#define __pp_page_to_nmdesc(p)	(_Generic((p),				\
+	const struct page * :	(const struct netmem_desc *)(p),	\
+	struct page * :		(struct netmem_desc *)(p)))
+
+/* CAUTION: Check if the page is a pp page before calling this helper or
+ * know it's a pp page.
+ */
+#define pp_page_to_nmdesc(p)						\
+({									\
+	DEBUG_NET_WARN_ON_ONCE(!page_pool_page_is_pp(p));		\
+	__pp_page_to_nmdesc(p);						\
+})
+
 /**
  * virt_to_netmem - convert virtual memory pointer to a netmem reference
  * @data: host memory pointer to convert
@@ -285,23 +302,6 @@ static inline struct net_iov *__netmem_clear_lsb(netmem_ref netmem)
 	return (struct net_iov *)((__force unsigned long)netmem & ~NET_IOV);
 }
 
-/* XXX: How to extract netmem_desc from page must be changed, once
- * netmem_desc no longer overlays on page and will be allocated through
- * slab.
- */
-#define __pp_page_to_nmdesc(p)	(_Generic((p),				\
-	const struct page * :	(const struct netmem_desc *)(p),	\
-	struct page * :		(struct netmem_desc *)(p)))
-
-/* CAUTION: Check if the page is a pp page before calling this helper or
- * know it's a pp page.
- */
-#define pp_page_to_nmdesc(p)						\
-({									\
-	DEBUG_NET_WARN_ON_ONCE(!page_pool_page_is_pp(p));		\
-	__pp_page_to_nmdesc(p);						\
-})
-
 /**
  * __netmem_get_pp - unsafely get pointer to the &page_pool backing @netmem
  * @netmem: netmem reference to get the pointer from
-- 
2.49.0