diff options
Diffstat (limited to 'arch/s390/include')
| -rw-r--r-- | arch/s390/include/asm/checksum.h | 50 |
1 files changed, 22 insertions, 28 deletions
diff --git a/arch/s390/include/asm/checksum.h b/arch/s390/include/asm/checksum.h index de97ae691060..c401a5fd3ad2 100644 --- a/arch/s390/include/asm/checksum.h +++ b/arch/s390/include/asm/checksum.h @@ -16,19 +16,18 @@ #include <linux/in6.h> /* - * computes the checksum of a memory block at buff, length len, - * and adds in "sum" (32-bit) + * Computes the checksum of a memory block at buff, length len, + * and adds in "sum" (32-bit). * - * returns a 32-bit number suitable for feeding into itself - * or csum_tcpudp_magic + * Returns a 32-bit number suitable for feeding into itself + * or csum_tcpudp_magic. * - * this function must be called with even lengths, except - * for the last fragment, which may be odd + * This function must be called with even lengths, except + * for the last fragment, which may be odd. * - * it's best to have buff aligned on a 32-bit boundary + * It's best to have buff aligned on a 32-bit boundary. */ -static inline __wsum -csum_partial(const void *buff, int len, __wsum sum) +static inline __wsum csum_partial(const void *buff, int len, __wsum sum) { register unsigned long reg2 asm("2") = (unsigned long) buff; register unsigned long reg3 asm("3") = (unsigned long) len; @@ -40,15 +39,15 @@ csum_partial(const void *buff, int len, __wsum sum) return sum; } -static inline __wsum -csum_partial_copy_nocheck (const void *src, void *dst, int len, __wsum sum) +static inline __wsum csum_partial_copy_nocheck(const void *src, void *dst, + int len, __wsum sum) { - memcpy(dst,src,len); + memcpy(dst, src, len); return csum_partial(dst, len, sum); } /* - * Fold a partial checksum without adding pseudo headers + * Fold a partial checksum without adding pseudo headers. */ static inline __sum16 csum_fold(__wsum sum) { @@ -60,9 +59,8 @@ static inline __sum16 csum_fold(__wsum sum) } /* - * This is a version of ip_compute_csum() optimized for IP headers, - * which always checksum on 4 octet boundaries. - * + * This is a version of ip_compute_csum() optimized for IP headers, + * which always checksums on 4 octet boundaries. */ static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl) { @@ -81,8 +79,8 @@ static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl) } /* - * computes the checksum of the TCP/UDP pseudo-header - * returns a 32-bit checksum + * Computes the checksum of the TCP/UDP pseudo-header. + * Returns a 32-bit checksum. */ static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr, __u32 len, __u8 proto, __wsum sum) @@ -98,22 +96,18 @@ static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr, __u32 len, } /* - * computes the checksum of the TCP/UDP pseudo-header - * returns a 16-bit checksum, already complemented + * Computes the checksum of the TCP/UDP pseudo-header. + * Returns a 16-bit checksum, already complemented. */ - -static inline __sum16 -csum_tcpudp_magic(__be32 saddr, __be32 daddr, __u32 len, __u8 proto, - __wsum sum) +static inline __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr, __u32 len, + __u8 proto, __wsum sum) { - return csum_fold(csum_tcpudp_nofold(saddr,daddr,len,proto,sum)); + return csum_fold(csum_tcpudp_nofold(saddr, daddr, len, proto, sum)); } /* - * this routine is used for miscellaneous IP-like checksums, mainly - * in icmp.c + * Used for miscellaneous IP-like checksums, mainly icmp. */ - static inline __sum16 ip_compute_csum(const void *buff, int len) { return csum_fold(csum_partial(buff, len, 0)); |