[RFC 0/2] do not depend on cpuhotplug logs in lru_add_drain_all

[Michal Hocko]

Hi,
this is an RFC to drop get_online_cpus from lru_add_drain_all ad this
has caused a very subtle lockdep splats recently [1]. I didn't get even
to properly test this yet and I am sending it early to check whether the
thinking behind is sound. I am basically following the same pattern we
have used for removing get_online_cpus from drain_all_pages which should
be the similar case.

Does anybody see any obvious problem?

[1] http://lkml.kernel.org/r/089e0825eec8955c1f055c83d476@xxxxxxxxxx