diff options
| author | Anders Roxell <anders.roxell@linaro.org> | 2015-03-20 21:03:53 +0100 |
|---|---|---|
| committer | Anders Roxell <anders.roxell@linaro.org> | 2015-03-20 21:03:53 +0100 |
| commit | e20e8b472345ea5babd805db6726d1a7000f7673 (patch) | |
| tree | 1aaff25991578806a867ba3efcb0f7fd59940388 /lib | |
| parent | 588956edf5bb33741de41687677f21f5c37671da (diff) | |
| parent | c59ecb2edfc11b725a0fa4cb5420c4dbae482c17 (diff) | |
Merge tag 'v3.14.36-rt31-lno1' into linux-linaro-lsk-v3.14-rt
Linux 3.14.36-rt31
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
Conflicts:
arch/arm64/kernel/setup.c
arch/x86/kernel/traps.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 |