[NET]: SH checksum annotations and cleanups.
* sanitize prototypes, annotate * kill useless shifts * usual ntohs->shift Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -23,7 +23,7 @@
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*
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* it's best to have buff aligned on a 32-bit boundary
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*/
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asmlinkage unsigned int csum_partial(const unsigned char * buff, int len, unsigned int sum);
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asmlinkage __wsum csum_partial(const void *buff, int len, __wsum sum);
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/*
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* the same as csum_partial, but copies from src while it
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@ -33,8 +33,8 @@ asmlinkage unsigned int csum_partial(const unsigned char * buff, int len, unsign
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* better 64-bit) boundary
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*/
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asmlinkage unsigned int csum_partial_copy_generic(const unsigned char *src, unsigned char *dst,
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int len, int sum, int *src_err_ptr, int *dst_err_ptr);
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asmlinkage __wsum csum_partial_copy_generic(const void *src, void *dst,
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int len, __wsum sum, int *src_err_ptr, int *dst_err_ptr);
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/*
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* Note: when you get a NULL pointer exception here this means someone
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@ -44,24 +44,25 @@ asmlinkage unsigned int csum_partial_copy_generic(const unsigned char *src, unsi
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* access_ok().
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*/
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static __inline__
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unsigned int csum_partial_copy_nocheck (const unsigned char *src, unsigned char *dst,
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int len, int sum)
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__wsum csum_partial_copy_nocheck(const void *src, void *dst,
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int len, __wsum sum)
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{
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return csum_partial_copy_generic ( src, dst, len, sum, NULL, NULL);
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}
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static __inline__
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unsigned int csum_partial_copy_from_user (const unsigned char *src, unsigned char *dst,
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int len, int sum, int *err_ptr)
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__wsum csum_partial_copy_from_user(const void __user *src, void *dst,
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int len, __wsum sum, int *err_ptr)
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{
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return csum_partial_copy_generic ( src, dst, len, sum, err_ptr, NULL);
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return csum_partial_copy_generic((__force const void *)src, dst,
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len, sum, err_ptr, NULL);
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}
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/*
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* Fold a partial checksum
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*/
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static __inline__ unsigned int csum_fold(unsigned int sum)
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static __inline__ __sum16 csum_fold(__wsum sum)
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{
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unsigned int __dummy;
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__asm__("swap.w %0, %1\n\t"
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@ -74,7 +75,7 @@ static __inline__ unsigned int csum_fold(unsigned int sum)
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: "=r" (sum), "=&r" (__dummy)
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: "0" (sum)
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: "t");
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return sum;
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return (__force __sum16)sum;
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}
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/*
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@ -84,7 +85,7 @@ static __inline__ unsigned int csum_fold(unsigned int sum)
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* i386 version by Jorge Cwik <jorge@laser.satlink.net>, adapted
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* for linux by * Arnt Gulbrandsen.
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*/
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static __inline__ unsigned short ip_fast_csum(unsigned char * iph, unsigned int ihl)
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static __inline__ __sum16 ip_fast_csum(const void *iph, unsigned int ihl)
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{
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unsigned int sum, __dummy0, __dummy1;
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@ -112,16 +113,15 @@ static __inline__ unsigned short ip_fast_csum(unsigned char * iph, unsigned int
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return csum_fold(sum);
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}
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static __inline__ unsigned long csum_tcpudp_nofold(unsigned long saddr,
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unsigned long daddr,
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static __inline__ __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
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unsigned short len,
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unsigned short proto,
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unsigned int sum)
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__wsum sum)
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{
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#ifdef __LITTLE_ENDIAN__
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unsigned long len_proto = (ntohs(len)<<16)+proto*256;
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unsigned long len_proto = (proto + len) << 8;
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#else
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unsigned long len_proto = (proto<<16)+len;
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unsigned long len_proto = proto + len;
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#endif
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__asm__("clrt\n\t"
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"addc %0, %1\n\t"
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@ -139,11 +139,10 @@ static __inline__ unsigned long csum_tcpudp_nofold(unsigned long saddr,
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* computes the checksum of the TCP/UDP pseudo-header
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* returns a 16-bit checksum, already complemented
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*/
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static __inline__ unsigned short int csum_tcpudp_magic(unsigned long saddr,
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unsigned long daddr,
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static __inline__ __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr,
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unsigned short len,
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unsigned short proto,
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unsigned int sum)
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__wsum sum)
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{
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return csum_fold(csum_tcpudp_nofold(saddr,daddr,len,proto,sum));
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}
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@ -153,18 +152,17 @@ static __inline__ unsigned short int csum_tcpudp_magic(unsigned long saddr,
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* in icmp.c
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*/
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static __inline__ unsigned short ip_compute_csum(unsigned char * buff, int len)
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static __inline__ __sum16 ip_compute_csum(const void *buff, int len)
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{
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return csum_fold (csum_partial(buff, len, 0));
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}
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#define _HAVE_ARCH_IPV6_CSUM
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#ifdef CONFIG_IPV6
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static __inline__ unsigned short int csum_ipv6_magic(struct in6_addr *saddr,
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struct in6_addr *daddr,
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__u32 len,
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unsigned short proto,
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unsigned int sum)
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static __inline__ __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
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const struct in6_addr *daddr,
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__u32 len, unsigned short proto,
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__wsum sum)
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{
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unsigned int __dummy;
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__asm__("clrt\n\t"
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@ -201,17 +199,18 @@ static __inline__ unsigned short int csum_ipv6_magic(struct in6_addr *saddr,
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* Copy and checksum to user
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*/
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#define HAVE_CSUM_COPY_USER
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static __inline__ unsigned int csum_and_copy_to_user (const unsigned char *src,
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unsigned char __user *dst,
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int len, int sum,
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static __inline__ __wsum csum_and_copy_to_user (const void *src,
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void __user *dst,
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int len, __wsum sum,
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int *err_ptr)
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{
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if (access_ok(VERIFY_WRITE, dst, len))
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return csum_partial_copy_generic(src, dst, len, sum, NULL, err_ptr);
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return csum_partial_copy_generic((__force const void *)src,
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dst, len, sum, NULL, err_ptr);
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if (len)
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*err_ptr = -EFAULT;
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return -1; /* invalid checksum */
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return (__force __wsum)-1; /* invalid checksum */
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}
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#endif /* __ASM_SH_CHECKSUM_H */
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