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net: constify skbuff and Qdisc elements

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Preliminary patch before tcp constification

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2011-10-20 17:45:43 -04:00 • committed by David S. Miller
parent 20c4cb792d
commit 05bdd2f143
2 changed files with 21 additions and 20 deletions
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17
include/linux/skbuff.h
View file

@ -853,9 +853,9 @@ static inline struct sk_buff *skb_unshare(struct sk_buff *skb,
* The reference count is not incremented and the reference is therefore
* volatile. Use with caution.
*/
static inline struct sk_buff *skb_peek(struct sk_buff_head *list_)
static inline struct sk_buff *skb_peek(const struct sk_buff_head *list_)
{
struct sk_buff *list = ((struct sk_buff *)list_)->next;
struct sk_buff *list = ((const struct sk_buff *)list_)->next;
if (list == (struct sk_buff *)list_)
list = NULL;
return list;
@ -874,9 +874,9 @@ static inline struct sk_buff *skb_peek(struct sk_buff_head *list_)
* The reference count is not incremented and the reference is therefore
* volatile. Use with caution.
*/
static inline struct sk_buff *skb_peek_tail(struct sk_buff_head *list_)
static inline struct sk_buff *skb_peek_tail(const struct sk_buff_head *list_)
{
struct sk_buff *list = ((struct sk_buff *)list_)->prev;
struct sk_buff *list = ((const struct sk_buff *)list_)->prev;
if (list == (struct sk_buff *)list_)
list = NULL;
return list;
@ -1830,7 +1830,7 @@ static inline dma_addr_t skb_frag_dma_map(struct device *dev,
* Returns true if modifying the header part of the cloned buffer
* does not requires the data to be copied.
*/
static inline int skb_clone_writable(struct sk_buff *skb, unsigned int len)
static inline int skb_clone_writable(const struct sk_buff *skb, unsigned int len)
{
return !skb_header_cloned(skb) &&
skb_headroom(skb) + len <= skb->hdr_len;
@ -2451,7 +2451,8 @@ static inline bool skb_warn_if_lro(const struct sk_buff *skb)
{
/* LRO sets gso_size but not gso_type, whereas if GSO is really
* wanted then gso_type will be set. */
struct skb_shared_info *shinfo = skb_shinfo(skb);
const struct skb_shared_info *shinfo = skb_shinfo(skb);
if (skb_is_nonlinear(skb) && shinfo->gso_size != 0 &&
unlikely(shinfo->gso_type == 0)) {
__skb_warn_lro_forwarding(skb);
@ -2475,7 +2476,7 @@ static inline void skb_forward_csum(struct sk_buff *skb)
* Instead of forcing ip_summed to CHECKSUM_NONE, we can
* use this helper, to document places where we make this assertion.
*/
static inline void skb_checksum_none_assert(struct sk_buff *skb)
static inline void skb_checksum_none_assert(const struct sk_buff *skb)
{
#ifdef DEBUG
BUG_ON(skb->ip_summed != CHECKSUM_NONE);
@ -2484,7 +2485,7 @@ static inline void skb_checksum_none_assert(struct sk_buff *skb)
bool skb_partial_csum_set(struct sk_buff *skb, u16 start, u16 off);
static inline bool skb_is_recycleable(struct sk_buff *skb, int skb_size)
static inline bool skb_is_recycleable(const struct sk_buff *skb, int skb_size)
{
if (irqs_disabled())
return false;