diff options
Diffstat (limited to 'arch/s390/include/asm/checksum.h')
| -rw-r--r-- | arch/s390/include/asm/checksum.h | 22 |
1 files changed, 7 insertions, 15 deletions
diff --git a/arch/s390/include/asm/checksum.h b/arch/s390/include/asm/checksum.h index f4b42db5d007..961c25c5124b 100644 --- a/arch/s390/include/asm/checksum.h +++ b/arch/s390/include/asm/checksum.h @@ -73,25 +73,17 @@ 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 */ -static inline __wsum -csum_tcpudp_nofold(__be32 saddr, __be32 daddr, __u32 len, __u8 proto, - __wsum sum) +static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr, __u32 len, + __u8 proto, __wsum sum) { - __u32 csum = (__force __u32)sum; + __u64 csum = (__force __u64)sum; csum += (__force __u32)saddr; - if (csum < (__force __u32)saddr) - csum++; - csum += (__force __u32)daddr; - if (csum < (__force __u32)daddr) - csum++; - - csum += len + proto; - if (csum < len + proto) - csum++; - - return (__force __wsum)csum; + csum += len; + csum += proto; + csum += (csum >> 32) | (csum << 32); + return (__force __wsum)(csum >> 32); } /* |