[NET]: SPARC64 checksum annotations and cleanups.
Al Viro [Wed, 15 Nov 2006 05:23:20 +0000 (21:23 -0800)]
* 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

index dc8bed2..70a006d 100644 (file)
@@ -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));
 }