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[NET]: Treat the sign of the result of skb_headroom() consistently

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In some places, the result of skb_headroom() is compared to an unsigned
integer, and in others, the result is compared to a signed integer.  Make
the comparisons consistent and correct.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Chuck Lever 2007-10-23 21:07:32 -07:00 committed by David S. Miller
parent 0ffdd58149
commit c2636b4d9e
9 changed files with 10 additions and 10 deletions
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4
include/linux/skbuff.h
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@ -994,7 +994,7 @@ static inline int pskb_may_pull(struct sk_buff *skb, unsigned int len)
*
* Return the number of bytes of free space at the head of an &sk_buff.
*/
static inline int skb_headroom(const struct sk_buff *skb)
static inline unsigned int skb_headroom(const struct sk_buff *skb)
{
return skb->data - skb->head;
}
@ -1347,7 +1347,7 @@ static inline struct sk_buff *netdev_alloc_skb(struct net_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, int len)
static inline int skb_clone_writable(struct sk_buff *skb, unsigned int len)
{
return !skb_header_cloned(skb) &&
skb_headroom(skb) + len <= skb->hdr_len;

2
net/ipv4/ip_gre.c
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@ -674,7 +674,7 @@ static int ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
struct rtable *rt; /* Route to the other host */
struct net_device *tdev; /* Device to other host */
struct iphdr *iph; /* Our new IP header */
int max_headroom; /* The extra header space needed */
unsigned int max_headroom; /* The extra header space needed */
int gre_hlen;
__be32 dst;
int mtu;

2
net/ipv4/ip_output.c
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@ -161,7 +161,7 @@ static inline int ip_finish_output2(struct sk_buff *skb)
struct dst_entry *dst = skb->dst;
struct rtable *rt = (struct rtable *)dst;
struct net_device *dev = dst->dev;
int hh_len = LL_RESERVED_SPACE(dev);
unsigned int hh_len = LL_RESERVED_SPACE(dev);
if (rt->rt_type == RTN_MULTICAST)
IP_INC_STATS(IPSTATS_MIB_OUTMCASTPKTS);

2
net/ipv4/ipip.c
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@ -515,7 +515,7 @@ static int ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
struct net_device *tdev; /* Device to other host */
struct iphdr *old_iph = ip_hdr(skb);
struct iphdr *iph; /* Our new IP header */
int max_headroom; /* The extra header space needed */
unsigned int max_headroom; /* The extra header space needed */
__be32 dst = tiph->daddr;
int mtu;

2
net/ipv4/ipvs/ip_vs_xmit.c
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@ -325,7 +325,7 @@ ip_vs_tunnel_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
__be16 df = old_iph->frag_off;
sk_buff_data_t old_transport_header = skb->transport_header;
struct iphdr *iph; /* Our new IP header */
int max_headroom; /* The extra header space needed */
unsigned int max_headroom; /* The extra header space needed */
int mtu;
EnterFunction(10);

2
net/ipv4/tcp_input.c
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@ -3909,7 +3909,7 @@ tcp_collapse(struct sock *sk, struct sk_buff_head *list,
while (before(start, end)) {
struct sk_buff *nskb;
int header = skb_headroom(skb);
unsigned int header = skb_headroom(skb);
int copy = SKB_MAX_ORDER(header, 0);
/* Too big header? This can happen with IPv6. */

2
net/ipv6/ip6_output.c
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@ -171,7 +171,7 @@ int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl,
u32 mtu;
if (opt) {
int head_room;
unsigned int head_room;
/* First: exthdrs may take lots of space (~8K for now)
MAX_HEADER is not enough.

2
net/ipv6/ip6_tunnel.c
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@ -838,7 +838,7 @@ static int ip6_tnl_xmit2(struct sk_buff *skb,
struct dst_entry *dst;
struct net_device *tdev;
int mtu;
int max_headroom = sizeof(struct ipv6hdr);
unsigned int max_headroom = sizeof(struct ipv6hdr);
u8 proto;
int err = -1;
int pkt_len;

2
net/ipv6/sit.c
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@ -430,7 +430,7 @@ static int ipip6_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
struct rtable *rt; /* Route to the other host */
struct net_device *tdev; /* Device to other host */
struct iphdr *iph; /* Our new IP header */
int max_headroom; /* The extra header space needed */
unsigned int max_headroom; /* The extra header space needed */
__be32 dst = tiph->daddr;
int mtu;
struct in6_addr *addr6;