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arm64: add missing conversion to __wsum in ip_fast_csum()

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ARM64 implementation of ip_fast_csum() do most of the work
in 128 or 64 bit and call csum_fold() to finalize. csum_fold()
itself take a __wsum argument, to insure that this value is
always a 32bit native-order value.

Fix this by adding the sadly needed '__force' to cast the native
'sum' to the type '__wsum'.

Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Luc Van Oostenryck 2017-06-29 16:31:40 +02:00 committed by Will Deacon
parent f0cda7e6dc
commit 50a4b05609
1 changed files with 1 additions and 1 deletions
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2
arch/arm64/include/asm/checksum.h
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@ -42,7 +42,7 @@ static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl)
} while (--ihl);
sum += ((sum >> 32) | (sum << 32));
return csum_fold(sum >> 32);
return csum_fold((__force u32)(sum >> 32));
}
#define ip_fast_csum ip_fast_csum