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[NET]: S390 checksum annotations and cleanups.
* sanitize prototypes, annotate * kill useless shifts Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Al Viro
David S. Miller
parent
879178cfbe
commit
f994aae1bd
1 changed files with 21 additions and 24 deletions
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@ -27,8 +27,8 @@
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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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static inline unsigned int
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csum_partial(const unsigned char * buff, int len, unsigned int sum)
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static inline __wsum
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csum_partial(const void *buff, int len, __wsum sum)
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{
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register unsigned long reg2 asm("2") = (unsigned long) buff;
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register unsigned long reg3 asm("3") = (unsigned long) len;
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@ -49,9 +49,9 @@ csum_partial(const unsigned char * buff, int len, unsigned int sum)
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* Copy from userspace and compute checksum. If we catch an exception
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* then zero the rest of the buffer.
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*/
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static inline unsigned int
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csum_partial_copy_from_user(const char __user *src, char *dst,
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int len, unsigned int sum,
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static inline __wsum
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csum_partial_copy_from_user(const void __user *src, void *dst,
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int len, __wsum sum,
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int *err_ptr)
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{
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int missing;
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@ -66,8 +66,8 @@ csum_partial_copy_from_user(const char __user *src, char *dst,
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}
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static inline unsigned int
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csum_partial_copy_nocheck (const char *src, char *dst, int len, unsigned int sum)
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static inline __wsum
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csum_partial_copy_nocheck (const void *src, void *dst, int len, __wsum sum)
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{
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memcpy(dst,src,len);
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return csum_partial(dst, len, sum);
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@ -76,8 +76,7 @@ csum_partial_copy_nocheck (const char *src, char *dst, int len, unsigned int sum
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/*
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* Fold a partial checksum without adding pseudo headers
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*/
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static inline unsigned short
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csum_fold(unsigned int sum)
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static inline __sum16 csum_fold(__wsum sum)
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{
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#ifndef __s390x__
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register_pair rp;
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@ -100,7 +99,7 @@ csum_fold(unsigned int sum)
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" srl %0,16\n" /* %0 = H+L+C */
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: "+&d" (sum) : : "cc", "2", "3");
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#endif /* __s390x__ */
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return ((unsigned short) ~sum);
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return (__force __sum16) ~sum;
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}
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/*
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@ -108,8 +107,7 @@ csum_fold(unsigned int sum)
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* which always checksum on 4 octet boundaries.
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*
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*/
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static inline unsigned short
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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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return csum_fold(csum_partial(iph, ihl*4, 0));
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}
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@ -118,10 +116,10 @@ ip_fast_csum(unsigned char *iph, unsigned int ihl)
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* computes the checksum of the TCP/UDP pseudo-header
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* returns a 32-bit checksum
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*/
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static inline unsigned int
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csum_tcpudp_nofold(unsigned long saddr, unsigned long daddr,
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static inline __wsum
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csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
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unsigned short len, unsigned short proto,
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unsigned int sum)
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__wsum sum)
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{
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#ifndef __s390x__
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asm volatile(
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@ -137,12 +135,12 @@ csum_tcpudp_nofold(unsigned long saddr, unsigned long daddr,
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"1:"
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: "+&d" (sum) : "d" (daddr) : "cc");
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asm volatile(
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" alr %0,%1\n" /* sum += (len<<16) + (proto<<8) */
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" alr %0,%1\n" /* sum += len + proto */
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" brc 12,2f\n"
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" ahi %0,1\n" /* add carry */
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"2:"
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: "+&d" (sum)
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: "d" (((unsigned int) len<<16) + (unsigned int) proto)
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: "d" (len + proto)
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: "cc");
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#else /* __s390x__ */
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asm volatile(
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@ -153,7 +151,7 @@ csum_tcpudp_nofold(unsigned long saddr, unsigned long daddr,
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"0: algr %0,%2\n" /* sum += daddr */
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" brc 12,1f\n"
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" aghi %0,1\n" /* add carry */
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"1: algfr %0,%3\n" /* sum += (len<<16) + proto */
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"1: algfr %0,%3\n" /* sum += len + proto */
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" brc 12,2f\n"
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" aghi %0,1\n" /* add carry */
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"2: srlg 0,%0,32\n"
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@ -163,7 +161,7 @@ csum_tcpudp_nofold(unsigned long saddr, unsigned long daddr,
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"3: llgfr %0,%0"
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: "+&d" (sum)
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: "d" (saddr), "d" (daddr),
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"d" (((unsigned int) len<<16) + (unsigned int) proto)
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"d" (len + proto)
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: "cc", "0");
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#endif /* __s390x__ */
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return sum;
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@ -174,10 +172,10 @@ csum_tcpudp_nofold(unsigned long saddr, unsigned long daddr,
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* returns a 16-bit checksum, already complemented
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*/
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static inline unsigned short int
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csum_tcpudp_magic(unsigned long saddr, unsigned long daddr,
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static inline __sum16
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csum_tcpudp_magic(__be32 saddr, __be32 daddr,
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unsigned short len, 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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@ -187,8 +185,7 @@ csum_tcpudp_magic(unsigned long saddr, unsigned long daddr,
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* in icmp.c
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*/
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static inline unsigned short
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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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