Nicholas Piggin <npig...@gmail.com> writes: > Excerpts from pet...@infradead.org's message of September 14, 2020 8:56 pm: >> On Mon, Sep 14, 2020 at 02:52:16PM +1000, Nicholas Piggin wrote: >>> Reading and modifying current->mm and current->active_mm and switching >>> mm should be done with irqs off, to prevent races seeing an intermediate >>> state. ... >>> >>> This is a bit ugly, but in the interest of fixing the bug and backporting >>> before all architectures are converted this is a compromise. >>> >>> Signed-off-by: Nicholas Piggin <npig...@gmail.com> >> >> Acked-by: Peter Zijlstra (Intel) <pet...@infradead.org> >> >> I'm thinking we want this selected on x86 as well. Andy? > > Thanks for the ack. The plan was to take it through the powerpc tree, > but if you'd want x86 to select it, maybe a topic branch?
I've put this series in a topic branch based on v5.9-rc2: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/log/?h=topic/irqs-off-activate-mm I plan to merge it into the powerpc/next tree for v5.10, but if anyone else wants to merge it that's fine too. cheers
