[PATCH net-next] net: skbuff: const-ify casts in skb_queue_* functions

[PATCH net-next] net: skbuff: const-ify casts in skb_queue_* functions

[Daniel Borkmann]

We should const-ify comparisons on skb_queue_* inline helper
functions as their parameters are const as well, so lets not
drop that.

Suggested-by: Brad Spengler <spender@grsecurity.net>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
---
 include/linux/skbuff.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 956e11a..d97f2d0 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -827,7 +827,7 @@ static inline struct skb_shared_hwtstamps *skb_hwtstamps(struct sk_buff *skb)
  */
 static inline int skb_queue_empty(const struct sk_buff_head *list)
 {
-	return list->next == (struct sk_buff *)list;
+	return list->next == (const struct sk_buff *) list;
 }
 
 /**
@@ -840,7 +840,7 @@ static inline int skb_queue_empty(const struct sk_buff_head *list)
 static inline bool skb_queue_is_last(const struct sk_buff_head *list,
 				     const struct sk_buff *skb)
 {
-	return skb->next == (struct sk_buff *)list;
+	return skb->next == (const struct sk_buff *) list;
 }
 
 /**
@@ -853,7 +853,7 @@ static inline bool skb_queue_is_last(const struct sk_buff_head *list,
 static inline bool skb_queue_is_first(const struct sk_buff_head *list,
 				      const struct sk_buff *skb)
 {
-	return skb->prev == (struct sk_buff *)list;
+	return skb->prev == (const struct sk_buff *) list;
 }
 
 /**
-- 
1.7.11.7

Re: [PATCH net-next] net: skbuff: const-ify casts in skb_queue_* functions

[David Miller]

From: Daniel Borkmann <dborkman@redhat.com>
Date: Tue,  7 Jan 2014 23:23:44 +0100

> We should const-ify comparisons on skb_queue_* inline helper
> functions as their parameters are const as well, so lets not
> drop that.
> 
> Suggested-by: Brad Spengler <spender@grsecurity.net>
> Signed-off-by: Daniel Borkmann <dborkman@redhat.com>

Also applied, thanks Daniel.