[NET]: M68Knommu checksum annotations and cleanups.

* sanitize prototypes, annotated
* collapsed csum_partial_copy()

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

arch/m68knommu/kernel/m68k_ksyms.c

@@ -38,7 +38,7 @@ EXPORT_SYMBOL(ip_fast_csum);
 EXPORT_SYMBOL(kernel_thread);
 
 /* Networking helper routines. */
-EXPORT_SYMBOL(csum_partial_copy);
+EXPORT_SYMBOL(csum_partial_copy_nocheck);
 
 /* The following are special because they're not called
    explicitly (the C compiler generates them).  Fortunately,

arch/m68knommu/lib/checksum.c

@@ -96,9 +96,9 @@ out:
  *	This is a version of ip_compute_csum() optimized for IP headers,
  *	which always checksum on 4 octet boundaries.
  */
-unsigned short ip_fast_csum(unsigned char * iph, unsigned int ihl)
+__sum16 ip_fast_csum(const void *iph, unsigned int ihl)
 {
-	return ~do_csum(iph,ihl*4);
+	return (__force __sum16)~do_csum(iph,ihl*4);
 }
 
 /*
@@ -113,15 +113,15 @@ unsigned short ip_fast_csum(unsigned char * iph, unsigned int ihl)
  *
  * it's best to have buff aligned on a 32-bit boundary
  */
-unsigned int csum_partial(const unsigned char * buff, int len, unsigned int sum)
+__wsum csum_partial(const void *buff, int len, __wsum sum)
 {
 	unsigned int result = do_csum(buff, len);
 
 	/* add in old sum, and carry.. */
-	result += sum;
-	if (sum > result)
+	result += (__force u32)sum;
+	if ((__force u32)sum > result)
 		result += 1;
-	return result;
+	return (__force __wsum)result;
 }
 
 EXPORT_SYMBOL(csum_partial);
@@ -130,21 +130,21 @@ EXPORT_SYMBOL(csum_partial);
  * this routine is used for miscellaneous IP-like checksums, mainly
  * in icmp.c
  */
-unsigned short ip_compute_csum(const unsigned char * buff, int len)
+__sum16 ip_compute_csum(const void *buff, int len)
 {
-	return ~do_csum(buff,len);
+	return (__force __sum16)~do_csum(buff,len);
 }
 
 /*
  * copy from fs while checksumming, otherwise like csum_partial
  */
 
-unsigned int
-csum_partial_copy_from_user(const unsigned char *src, unsigned char *dst,
-			    int len, int sum, int *csum_err)
+__wsum
+csum_partial_copy_from_user(const void __user *src, void *dst,
+			    int len, __wsum sum, int *csum_err)
 {
 	if (csum_err) *csum_err = 0;
-	memcpy(dst, src, len);
+	memcpy(dst, (__force const void *)src, len);
 	return csum_partial(dst, len, sum);
 }
 
@@ -152,8 +152,8 @@ csum_partial_copy_from_user(const unsigned char *src, unsigned char *dst,
  * copy from ds while checksumming, otherwise like csum_partial
  */
 
-unsigned int
-csum_partial_copy(const unsigned char *src, unsigned char *dst, int len, int sum)
+__wsum
+csum_partial_copy_nocheck(const void *src, void *dst, int len, __wsum sum)
 {
 	memcpy(dst, src, len);
 	return csum_partial(dst, len, sum);