netdev - [PATCH net-next] net: skb_can_coalesce returns a boolean

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Date:	Tue, 24 Apr 2012 05:48:27 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	netdev <netdev@...r.kernel.org>
Subject: [PATCH net-next] net: skb_can_coalesce returns a boolean

From: Eric Dumazet <edumazet@...gle.com>

Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
 include/linux/skbuff.h |    6 +++---
 net/ipv4/tcp.c         |    3 ++-
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index f25795c..4a656b5 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1963,8 +1963,8 @@ static inline int skb_add_data(struct sk_buff *skb,
 	return -EFAULT;
 }
 
-static inline int skb_can_coalesce(struct sk_buff *skb, int i,
-				   const struct page *page, int off)
+static inline bool skb_can_coalesce(struct sk_buff *skb, int i,
+				    const struct page *page, int off)
 {
 	if (i) {
 		const struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i - 1];
@@ -1972,7 +1972,7 @@ static inline int skb_can_coalesce(struct sk_buff *skb, int i,
 		return page == skb_frag_page(frag) &&
 		       off == frag->page_offset + skb_frag_size(frag);
 	}
-	return 0;
+	return false;
 }
 
 static inline int __skb_linearize(struct sk_buff *skb)
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index bcc4eab..de6a238 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -848,9 +848,10 @@ static ssize_t do_tcp_sendpages(struct sock *sk, struct page **pages, int poffse
 	while (psize > 0) {
 		struct sk_buff *skb = tcp_write_queue_tail(sk);
 		struct page *page = pages[poffset / PAGE_SIZE];
-		int copy, i, can_coalesce;
+		int copy, i;
 		int offset = poffset % PAGE_SIZE;
 		int size = min_t(size_t, psize, PAGE_SIZE - offset);
+		bool can_coalesce;
 
 		if (!tcp_send_head(sk) || (copy = size_goal - skb->len) <= 0) {
 new_segment:


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