Re: [RFC] hotplug, memory: move register_memory_resource out of thelock_memory_hotplug

[David Rientjes]

On Tue, 14 Jan 2014, Andrew Morton wrote:

> From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> Subject: mm/memory_hotplug.c: register_memory_resource() fixes
> 
> - register_memory_resource() should not go BUG on ENOMEM.  That's
>   appropriate at system boot time, but not at memory-hotplug time.  Fix.
> 
> - register_memory_resource()'s caller is incorrectly replacing
>   request_resource()'s -EBUSY with -EEXIST.  Fix this by propagating
>   errors appropriately.
> 

Unfortunately, -EEXIST is a special case return value for both 
acpi_memory_enable_device() and hv_mem_hot_add(), so they would need to be 
modified to agree concurrently with this change.
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