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Commit 475b8f31 authored by Al Viro's avatar Al Viro Committed by David S. Miller
Browse files

[NET]: AVR32 checksum annotations and cleanups. 



* sanitize prototypes, annotate
* kill useless shifts
* kill useless ntohs (it's big-endian, for fsck sake!)

Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 0ffb7122

include/asm-avr32/checksum.h

+18 −22
Original line number Diff line number Diff line
@@ -20,8 +20,7 @@ 
 *

 * 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);



/*

 * the same as csum_partial, but copies from src while it
@@ -30,8 +29,8 @@ unsigned int csum_partial(const unsigned char * buff, int len, 
 * here even more important to align src and dst on a 32-bit (or even

 * better 64-bit) boundary

 */

unsigned int csum_partial_copy_generic(const char *src, char *dst, int len,

				       int sum, int *src_err_ptr,

__wsum csum_partial_copy_generic(const void *src, void *dst, int len,

				       __wsum sum, int *src_err_ptr,

				       int *dst_err_ptr);



/*
@@ -42,17 +41,17 @@ unsigned int csum_partial_copy_generic(const char *src, char *dst, int len, 
 *	verify_area().

 */

static inline

unsigned int csum_partial_copy_nocheck(const char *src, char *dst,

				       int len, int sum)

__wsum csum_partial_copy_nocheck(const void *src, void *dst,

				       int len, __wsum sum)

{

	return csum_partial_copy_generic(src, dst, len, sum, NULL, NULL);

}



static inline

unsigned int csum_partial_copy_from_user (const char __user *src, char *dst,

					  int len, int sum, int *err_ptr)

__wsum csum_partial_copy_from_user(const void __user *src, void *dst,

					  int len, __wsum sum, int *err_ptr)

{

	return csum_partial_copy_generic((const char __force *)src, dst, len,

	return csum_partial_copy_generic((const void __force *)src, dst, len,

					 sum, err_ptr, NULL);

}
@@ -60,8 +59,7 @@ unsigned int csum_partial_copy_from_user (const char __user *src, char *dst, 
 *	This is a version of ip_compute_csum() optimized for IP headers,

 *	which always checksum on 4 octet boundaries.

 */

static inline unsigned short ip_fast_csum(unsigned char *iph,

					  unsigned int ihl)

static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl)

{

	unsigned int sum, tmp;
@@ -90,14 +88,14 @@ static inline unsigned short ip_fast_csum(unsigned char *iph, 
		: "=r"(sum), "=r"(iph), "=r"(ihl), "=r"(tmp)

		: "1"(iph), "2"(ihl)

		: "memory", "cc");

	return sum;

	return (__force __sum16)sum;

}



/*

 *	Fold a partial checksum

 */



static inline unsigned int csum_fold(unsigned int sum)

static inline __sum16 csum_fold(__wsum sum)

{

	unsigned int tmp;
@@ -109,21 +107,20 @@ static inline unsigned int csum_fold(unsigned int sum) 
	    : "=&r"(sum), "=&r"(tmp)

	    : "0"(sum));



	return ~sum;

	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 short len,

					       unsigned short proto,

					       unsigned int sum)

					       __wsum sum)

{

	asm("	add	%0, %1\n"

	    "	adc	%0, %0, %2\n"

	    "	adc	%0, %0, %3\n"

	    "	acr	%0"

	    : "=r"(sum)

	    : "r"(daddr), "r"(saddr), "r"(ntohs(len) | (proto << 16)),

	    : "r"(daddr), "r"(saddr), "r"(len + proto),

	      "0"(sum)

	    : "cc");
@@ -134,11 +131,10 @@ 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));

}
@@ -148,7 +144,7 @@ static inline unsigned short int csum_tcpudp_magic(unsigned long saddr, 
 * 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));

}