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Commit d5c63936 authored by Al Viro's avatar Al Viro Committed by David S. Miller
Browse files

[NET]: SPARC64 checksum annotations and cleanups. 



* sanitize prototypes, annotate
* kill useless shift

Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 16ec7e16

include/asm-sparc64/checksum.h

+36 −41
Original line number Diff line number Diff line
@@ -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));

}