diff options
| author | Alex Shi <alex.shi@linaro.org> | 2015-03-10 09:33:40 +0800 |
|---|---|---|
| committer | Alex Shi <alex.shi@linaro.org> | 2015-03-10 09:48:38 +0800 |
| commit | 42f504e28a169ebfea0e3d9c6e151451800e41d5 (patch) | |
| tree | d01c160e4e9a5c094e91706ab60651e26098fb60 /lib | |
| parent | c810fcb930d9c705774427bb6eb551b2e1108adb (diff) | |
| parent | 389fb5fb0b8b812ce0e853d5eca748b08fc73289 (diff) | |
Merge tag 'v3.10.71' into linux-linaro-lsk
This is the 3.10.71 stable release
Conflicts:
arch/arm64/kernel/setup.c
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/checksum.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/lib/checksum.c b/lib/checksum.c index 129775eb6de6..8b39e86dbab5 100644 --- a/lib/checksum.c +++ b/lib/checksum.c @@ -181,6 +181,15 @@ csum_partial_copy(const void *src, void *dst, int len, __wsum sum) EXPORT_SYMBOL(csum_partial_copy); #ifndef csum_tcpudp_nofold +static inline u32 from64to32(u64 x) +{ + /* add up 32-bit and 32-bit for 32+c bit */ + x = (x & 0xffffffff) + (x >> 32); + /* add up carry.. */ + x = (x & 0xffffffff) + (x >> 32); + return (u32)x; +} + __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len, unsigned short proto, @@ -195,8 +204,7 @@ __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr, #else s += (proto + len) << 8; #endif - s += (s >> 32); - return (__force __wsum)s; + return (__force __wsum)from64to32(s); } EXPORT_SYMBOL(csum_tcpudp_nofold); #endif |