From 322529961e3b3e64fdf1a3e46a45294456c91acf Mon Sep 17 00:00:00 2001
From: Al Viro
Date: Tue, 14 Nov 2006 21:16:30 -0800
Subject: [NET]: IA64 checksum annotations and cleanups.

* sanitize prototypes, annotate
* ntohs -> shift in checksum calculations
* kill access_ok() in csum_partial_copy_from_user
* collapse do_csum_partial_copy_from_user

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 include/asm-ia64/checksum.h | 31 ++++++++++++++-----------------
 1 file changed, 14 insertions(+), 17 deletions(-)

(limited to 'include/asm-ia64')

diff --git a/include/asm-ia64/checksum.h b/include/asm-ia64/checksum.h
index 1f230ff8ea81..bd40f4756ce1 100644
--- a/include/asm-ia64/checksum.h
+++ b/include/asm-ia64/checksum.h
@@ -10,23 +10,21 @@
  * This is a version of ip_compute_csum() optimized for IP headers,
  * which always checksum on 4 octet boundaries.
  */
-extern unsigned short ip_fast_csum (unsigned char * iph, unsigned int ihl);
+extern __sum16 ip_fast_csum(const void *iph, unsigned int ihl);
 
 /*
  * Computes the checksum of the TCP/UDP pseudo-header returns a 16-bit
  * checksum, already complemented
  */
-extern unsigned short int csum_tcpudp_magic (unsigned long saddr,
-					     unsigned long daddr,
+extern __sum16 csum_tcpudp_magic (__be32 saddr, __be32 daddr,
 					     unsigned short len,
 					     unsigned short proto,
-					     unsigned int sum);
+					     __wsum sum);
 
-extern unsigned int csum_tcpudp_nofold (unsigned long saddr,
-					unsigned long daddr,
+extern __wsum csum_tcpudp_nofold (__be32 saddr, __be32 daddr,
 					unsigned short len,
 					unsigned short proto,
-					unsigned int sum);
+					__wsum sum);
 
 /*
  * Computes the checksum of a memory block at buff, length len,
@@ -40,8 +38,7 @@ extern unsigned int csum_tcpudp_nofold (unsigned long saddr,
  *
  * 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);
 
 /*
  * Same as csum_partial, but copies from src while it checksums.
@@ -49,28 +46,28 @@ extern unsigned int csum_partial (const unsigned char * buff, int len,
  * Here it is even more important to align src and dst on a 32-bit (or
  * even better 64-bit) boundary.
  */
-extern unsigned int csum_partial_copy_from_user (const char *src, char *dst,
-						 int len, unsigned int sum,
+extern __wsum csum_partial_copy_from_user(const void __user *src, void *dst,
+						 int len, __wsum sum,
 						 int *errp);
 
-extern unsigned int csum_partial_copy_nocheck (const char *src, char *dst,
-					       int len, unsigned int sum);
+extern __wsum csum_partial_copy_nocheck(const void *src, void *dst,
+					       int len, __wsum sum);
 
 /*
  * This routine is used for miscellaneous IP-like checksums, mainly in
  * icmp.c
  */
-extern unsigned short ip_compute_csum (unsigned char *buff, int len);
+extern __sum16 ip_compute_csum(const void *buff, int len);
 
 /*
  * Fold a partial checksum without adding pseudo headers.
  */
-static inline unsigned short
-csum_fold (unsigned int sum)
+static inline __sum16 csum_fold(__wsum csum)
 {
+	u32 sum = (__force u32)csum;
 	sum = (sum & 0xffff) + (sum >> 16);
 	sum = (sum & 0xffff) + (sum >> 16);
-	return ~sum;
+	return (__force __sum16)~sum;
 }
 
 #endif /* _ASM_IA64_CHECKSUM_H */
-- 
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