On Tue, 27 Nov 2018, Thomas Gleixner wrote: > That's racy and does not prevent the situation because the TIF flags are > updated befor the UPDATE bit is set.
> So __speculation_ctrl_update() might see the new bits, but not > TIF_SPEC_UPDATE. Hm, right, scratch that. We'd need to do that before updating TIF_SPEC_IB in task_update_spec_tif(), but that has the opposite ordering issue. Thanks, -- Jiri Kosina SUSE Labs
