Re: [PATCH 1/4] mmzone: make holding lock_memory_hotplug() arequirement for updating pgdat size

[David Rientjes]

On Wed, 1 May 2013, Cody P Schafer wrote:

> All updaters of pgdat size (spanned_pages, start_pfn, and
> present_pages) currently also hold lock_memory_hotplug() (in addition
> to pgdat_resize_lock()).
> 
> Document this and make holding of that lock a requirement on the update
> side for now, but keep the pgdat_resize_lock() around for readers that
> can't lock a mutex.
> 
> Signed-off-by: Cody P Schafer <cody@xxxxxxxxxxxxxxxxxx>

Nack, these fields are initialized at boot without lock_memory_hotplug(), 
so you're statement is wrong, and all you need is pgdat_resize_lock().
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