[NET]: SPARC64 checksum annotations and cleanups.

* sanitize prototypes, annotate
* kill useless shift

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

include/asm-sparc64/checksum.h

@@ -30,7 +30,7 @@
  *
  * it's best to have buff aligned on a 32-bit boundary
  */
-extern unsigned int csum_partial(const unsigned char * buff, int len, unsigned int sum);
+extern __wsum csum_partial(const void * buff, int len, __wsum sum);
 
 /* the same as csum_partial, but copies from user space while it
  * checksums
@@ -38,52 +38,50 @@ extern unsigned int csum_partial(const unsigned char * buff, int len, unsigned i
  * here even more important to align src and dst on a 32-bit (or even
  * better 64-bit) boundary
  */
-extern unsigned int csum_partial_copy_nocheck(const unsigned char *src,
-					      unsigned char *dst,
-					      int len, unsigned int sum);
-
-extern long __csum_partial_copy_from_user(const unsigned char __user *src,
-					  unsigned char *dst, int len,
-					  unsigned int sum);
-
-static inline unsigned int
-csum_partial_copy_from_user(const unsigned char __user *src,
-			    unsigned char *dst, int len,
-			    unsigned int sum, int *err)
+extern __wsum csum_partial_copy_nocheck(const void *src, void *dst,
+					      int len, __wsum sum);
+
+extern long __csum_partial_copy_from_user(const void __user *src,
+					  void *dst, int len,
+					  __wsum sum);
+
+static inline __wsum
+csum_partial_copy_from_user(const void __user *src,
+			    void *dst, int len,
+			    __wsum sum, int *err)
 {
 	long ret = __csum_partial_copy_from_user(src, dst, len, sum);
 	if (ret < 0)
 		*err = -EFAULT;
-	return (unsigned int) ret;
+	return (__force __wsum) ret;
 }
 
 /* 
  *	Copy and checksum to user
  */
 #define HAVE_CSUM_COPY_USER
-extern long __csum_partial_copy_to_user(const unsigned char *src,
-					unsigned char __user *dst, int len,
-					  unsigned int sum);
-
-static inline unsigned int
-csum_and_copy_to_user(const unsigned char *src,
-		      unsigned char __user *dst, int len,
-		      unsigned int sum, int *err)
+extern long __csum_partial_copy_to_user(const void *src,
+					void __user *dst, int len,
+					  __wsum sum);
+
+static inline __wsum
+csum_and_copy_to_user(const void *src,
+		      void __user *dst, int len,
+		      __wsum sum, int *err)
 {
 	long ret = __csum_partial_copy_to_user(src, dst, len, sum);
 	if (ret < 0)
 		*err = -EFAULT;
-	return (unsigned int) ret;
+	return (__force __wsum) ret;
 }
 
 /* ihl is always 5 or greater, almost always is 5, and iph is word aligned
  * the majority of the time.
  */
-extern unsigned short ip_fast_csum(__const__ unsigned char *iph,
-				   unsigned int ihl);
+extern __sum16 ip_fast_csum(const void *iph, unsigned int ihl);
 
 /* Fold a partial checksum without adding pseudo headers. */
-static inline unsigned short csum_fold(unsigned int sum)
+static inline __sum16 csum_fold(__wsum sum)
 {
 	unsigned int tmp;
 
@@ -93,16 +91,15 @@ static inline unsigned short csum_fold(unsigned int sum)
 "	addc		%1, %%g0, %1\n"
 "	xnor		%%g0, %1, %0\n"
 	: "=&r" (sum), "=r" (tmp)
-	: "0" (sum), "1" (sum<<16)
+	: "0" (sum), "1" ((__force u32)sum<<16)
 	: "cc");
-	return (sum & 0xffff);
+	return (__force __sum16)sum;
 }
 
-static inline unsigned long csum_tcpudp_nofold(unsigned long saddr,
-					       unsigned long daddr,
+static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
 					       unsigned int len,
 					       unsigned short proto,
-					       unsigned int sum)
+					       __wsum sum)
 {
 	__asm__ __volatile__(
 "	addcc		%1, %0, %0\n"
@@ -110,7 +107,7 @@ static inline unsigned long csum_tcpudp_nofold(unsigned long saddr,
 "	addccc		%3, %0, %0\n"
 "	addc		%0, %%g0, %0\n"
 	: "=r" (sum), "=r" (saddr)
-	: "r" (daddr), "r" ((proto<<16)+len), "0" (sum), "1" (saddr)
+	: "r" (daddr), "r" (proto + len), "0" (sum), "1" (saddr)
 	: "cc");
 	return sum;
 }
@@ -119,22 +116,20 @@ static inline unsigned long csum_tcpudp_nofold(unsigned long saddr,
  * computes the checksum of the TCP/UDP pseudo-header
  * returns a 16-bit checksum, already complemented
  */
-static inline unsigned short int csum_tcpudp_magic(unsigned long saddr,
-						   unsigned long daddr,
+static inline __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr,
 						   unsigned short len,
 						   unsigned short proto,
-						   unsigned int sum) 
+						   __wsum sum)
 {
 	return csum_fold(csum_tcpudp_nofold(saddr,daddr,len,proto,sum));
 }
 
 #define _HAVE_ARCH_IPV6_CSUM
 
-static inline unsigned short int csum_ipv6_magic(struct in6_addr *saddr,
-						 struct in6_addr *daddr,
-						 __u32 len,
-						 unsigned short proto,
-						 unsigned int sum) 
+static inline __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
+				      const struct in6_addr *daddr,
+				      __u32 len, unsigned short proto,
+				      __wsum sum)
 {
 	__asm__ __volatile__ (
 "	addcc		%3, %4, %%g7\n"
@@ -165,7 +160,7 @@ static inline unsigned short int csum_ipv6_magic(struct in6_addr *saddr,
 }
 
 /* this routine is used for miscellaneous IP-like checksums, mainly in icmp.c */
-static inline unsigned short ip_compute_csum(unsigned char * buff, int len)
+static inline __sum16 ip_compute_csum(const void *buff, int len)
 {
 	return csum_fold(csum_partial(buff, len, 0));
 }