netdev - [PATCH v2 7/7] net: Convert skb_frag_t to bio

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Message-Id: <20190501144457.7942-8-willy@infradead.org>
Date:   Wed,  1 May 2019 07:44:57 -0700
From:   Matthew Wilcox <willy@...radead.org>
To:     davem@...emloft.net
Cc:     "Matthew Wilcox (Oracle)" <willy@...radead.org>, hch@....de,
        netdev@...r.kernel.org
Subject: [PATCH v2 7/7] net: Convert skb_frag_t to bio_vec

From: "Matthew Wilcox (Oracle)" <willy@...radead.org>

There are a lot of users of frag->page_offset, and of struct
skb_frag_struct, so use a union and a compatibility define respectively
to avoid converting those users today.

Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>
---
 include/linux/bvec.h   | 5 ++++-
 include/linux/skbuff.h | 9 +++------
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/include/linux/bvec.h b/include/linux/bvec.h
index ff13cbc1887d..49a8ad6c331b 100644
--- a/include/linux/bvec.h
+++ b/include/linux/bvec.h
@@ -31,7 +31,10 @@
 struct bio_vec {
 	struct page	*bv_page;
 	unsigned int	bv_len;
-	unsigned int	bv_offset;
+	union {
+		__u32		page_offset;
+		unsigned int	bv_offset;
+	};
 };
 
 struct bvec_iter {
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index df07b3144c77..d61d496e0083 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -18,6 +18,7 @@
 #include <linux/compiler.h>
 #include <linux/time.h>
 #include <linux/bug.h>
+#include <linux/bvec.h>
 #include <linux/cache.h>
 #include <linux/rbtree.h>
 #include <linux/socket.h>
@@ -312,13 +313,9 @@ extern int sysctl_max_skb_frags;
  */
 #define GSO_BY_FRAGS	0xFFFF
 
-typedef struct skb_frag_struct skb_frag_t;
+#define skb_frag_struct bio_vec
 
-struct skb_frag_struct {
-	struct page *bv_page;
-	unsigned int bv_len;
-	__u32 page_offset;
-};
+typedef struct bio_vec skb_frag_t;
 
 /**
  * skb_frag_size - Returns the size of a skb fragment
-- 
2.20.1