On Thu, 2016-11-03 at 05:10:55 UTC, Paul Mackerras wrote: > 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. > > Signed-off-by: Paul Mackerras <pau...@ozlabs.org>
Applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/b492f7e4e07a28e706db26cf4943bb cheers
