[NET]: Annotate csum_partial() callers in net/*

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/socket.h

@@ -293,7 +293,7 @@ extern int memcpy_fromiovecend(unsigned char *kdata, struct iovec *iov,
 extern int csum_partial_copy_fromiovecend(unsigned char *kdata, 
 					  struct iovec *iov, 
 					  int offset, 
-					  unsigned int len, int *csump);
+					  unsigned int len, __wsum *csump);
 
 extern int verify_iovec(struct msghdr *m, struct iovec *iov, char *address, int mode);
 extern int memcpy_toiovec(struct iovec *v, unsigned char *kdata, int len);

include/linux/sunrpc/xdr.h

@@ -151,7 +151,7 @@ typedef struct {
 	struct sk_buff	*skb;
 	unsigned int	offset;
 	size_t		count;
-	unsigned int	csum;
+	__wsum		csum;
 } skb_reader_t;
 
 typedef size_t (*skb_read_actor_t)(skb_reader_t *desc, void *to, size_t len);

net/core/iovec.c

@@ -158,9 +158,9 @@ int memcpy_fromiovecend(unsigned char *kdata, struct iovec *iov, int offset,
  *	call to this function will be unaligned also.
  */
 int csum_partial_copy_fromiovecend(unsigned char *kdata, struct iovec *iov,
-				 int offset, unsigned int len, int *csump)
+				 int offset, unsigned int len, __wsum *csump)
 {
-	int csum = *csump;
+	__wsum csum = *csump;
 	int partial_cnt = 0, err = 0;
 
 	/* Skip over the finished iovecs */

net/core/skbuff.c

@@ -1265,7 +1265,7 @@ unsigned int skb_checksum(const struct sk_buff *skb, int offset,
 
 		end = start + skb_shinfo(skb)->frags[i].size;
 		if ((copy = end - offset) > 0) {
-			unsigned int csum2;
+			__wsum csum2;
 			u8 *vaddr;
 			skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
 

net/ipv4/ip_output.c

@@ -682,19 +682,19 @@ ip_generic_getfrag(void *from, char *to, int offset, int len, int odd, struct sk
 		if (memcpy_fromiovecend(to, iov, offset, len) < 0)
 			return -EFAULT;
 	} else {
-		unsigned int csum = 0;
+		__wsum csum = 0;
 		if (csum_partial_copy_fromiovecend(to, iov, offset, len, &csum) < 0)
 			return -EFAULT;
 		skb->csum = csum_block_add(skb->csum, csum, odd);
 	}
 	return 0;
 }
 
-static inline unsigned int
+static inline __wsum
 csum_page(struct page *page, int offset, int copy)
 {
 	char *kaddr;
-	unsigned int csum;
+	__wsum csum;
 	kaddr = kmap(page);
 	csum = csum_partial(kaddr + offset, copy, 0);
 	kunmap(page);
@@ -1166,7 +1166,7 @@ ssize_t	ip_append_page(struct sock *sk, struct page *page,
 		}
 
 		if (skb->ip_summed == CHECKSUM_NONE) {
-			unsigned int csum;
+			__wsum csum;
 			csum = csum_page(page, offset, len);
 			skb->csum = csum_block_add(skb->csum, csum, skb->len);
 		}

net/unix/af_unix.c

@@ -151,8 +151,9 @@ static inline void unix_set_secdata(struct scm_cookie *scm, struct sk_buff *skb)
  *    each socket state is protected by separate rwlock.
  */
 
-static inline unsigned unix_hash_fold(unsigned hash)
+static inline unsigned unix_hash_fold(__wsum n)
 {
+	unsigned hash = (__force unsigned)n;
 	hash ^= hash>>16;
 	hash ^= hash>>8;
 	return hash&(UNIX_HASH_SIZE-1);