On Thu, Aug 11, 2016 at 07:27:09PM +0200, Roman Pen wrote: > This patch targets two things which are related to ->confirm_switch: > > 1. Init ->confirm_switch pointer with NULL on percpu_ref_init() or > kernel frightfully complains with WARN_ON_ONCE(ref->confirm_switch) > at __percpu_ref_switch_to_atomic if memory chunk was not properly > zeroed. > > 2. Warn if RCU callback is still in progress on percpu_ref_exit(). > The race still exists, because percpu_ref_call_confirm_rcu() > drops ->confirm_switch to NULL early, but that is only a warning > and still the caller is responsible that ref is no longer in > active use. Hopefully that can help to catch incorrect usage > of percpu-refcount. > > Signed-off-by: Roman Pen <roman.peny...@profitbricks.com> > Cc: Tejun Heo <t...@kernel.org> > Cc: linux-kernel@vger.kernel.org
Applied to percpu/for-4.9. Thanks. -- tejun
