Paul Mackerras <pau...@ozlabs.org> writes:
> These functions compute an IP checksum by computing a 64-bit sum and
> folding it to 32 bits (the "nofold" in their names refers to folding
> down to 16 bits). However, doing (u32) (s + (s >> 32)) is not
> sufficient to fold a 64-bit sum to 32 bits correctly. The addition
> can produce a carry out from bit 31, which needs to be added in to
> the sum to produce the correct result.
>
> To fix this, we copy the from64to32() function from lib/checksum.c
> and use that.
This collided with:
f9d4286b9516 ("arch/powerpc: Update parameters for csum_tcpudp_magic &
csum_tcpudp_nofold")
Mind rebasing?
cheers
