From: Nicholas Piggin <npiggin@xxxxxxxxx> Date: Mon, 14 Sep 2020 14:52:18 +1000 ... > The basic fix for sparc64 is to remove its mm_cpumask clearing code. The > optimisation could be effectively restored by sending IPIs to mm_cpumask > members and having them remove themselves from mm_cpumask. This is more > tricky so I leave it as an exercise for someone with a sparc64 SMP. > powerpc has a (currently similarly broken) example. > > Signed-off-by: Nicholas Piggin <npiggin@xxxxxxxxx> Sad to see this optimization go away, but what can I do: Acked-by: David S. Miller <davem@xxxxxxxxxxxxx>
