Commit 50a4b056 authored Jun 29, 2017 by Luc Van Oostenryck Committed by Will Deacon Jun 29, 2017

arm64: add missing conversion to __wsum in ip_fast_csum()



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>

parent f0cda7e6

arch/arm64/include/asm/checksum.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -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