On Thu, Aug 20, 2020 at 02:27:40AM +0000, Justin He wrote:
> Hi Greg,
> If anybody wants to backport it to stable tree, there are 2 pre-condition for
> this commit ("[PATCH] mm/memory_hotplug: fix unpaired mem_hotplug_begin/done")
>
> 1. eca499ab3 ("mm/hotplug: make remove_memory() interface usable") applied
> in v5.2, it disabled the BUG() when check_memblock_offlined_cb() failed.
> 2. f1037ec0c ("mm/memory_hotplug: fix remove_memory() lockdep splat")
> in v5.5, it introduced the unpair but depends on eca499ab3
>
> I checked https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/mm/memory_hotplug.c?h=linux-4.19.y#n1913.
> Looks like stable tree v4.19 hasn't applied eca499ab3 but applied f1037ec0c.
> Hence I don't think v4.19 needs this patch.
Thanks, I'll just leave this out of 4.19.y for now then.
greg k-h
