[NET]: IP header modifier helpers annotations.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/ip.h b/include/net/ip.h
index eafbcaf..83cb9ac 100644
--- a/include/net/ip.h
+++ b/include/net/ip.h
@@ -192,9 +192,9 @@
static inline
int ip_decrease_ttl(struct iphdr *iph)
{
- u32 check = iph->check;
- check += htons(0x0100);
- iph->check = check + (check>=0xFFFF);
+ u32 check = (__force u32)iph->check;
+ check += (__force u32)htons(0x0100);
+ iph->check = (__force __sum16)(check + (check>=0xFFFF));
return --iph->ttl;
}