diff options
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/checksum.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/checksum.h b/arch/powerpc/include/asm/checksum.h index 5e43d2d40084..e8d9ef4755a4 100644 --- a/arch/powerpc/include/asm/checksum.h +++ b/arch/powerpc/include/asm/checksum.h @@ -130,6 +130,22 @@ static inline __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr, return csum_fold(csum_tcpudp_nofold(saddr, daddr, len, proto, sum)); } +#define HAVE_ARCH_CSUM_ADD +static inline __wsum csum_add(__wsum csum, __wsum addend) +{ +#ifdef __powerpc64__ + u64 res = (__force u64)csum; + + res += (__force u64)addend; + return (__force __wsum)((u32)res + (res >> 32)); +#else + asm("addc %0,%0,%1;" + "addze %0,%0;" + : "+r" (csum) : "r" (addend)); + return csum; +#endif +} + #endif #endif /* __KERNEL__ */ #endif |