Re: [PATCH v2 2/3] mm/memory_hotplug: Drop mem_blk check from unregister_mem_sect_under_nodes

[Oscar Salvador <osalvador@xxxxxxxxxxxxxxxxxx>]

On Tue, Aug 14, 2018 at 11:30:51AM +0200, David Hildenbrand wrote:

> 
> While it is correct in current code, I wonder if this sanity check
> should stay. I would completely agree if it would be a static function.

Hi David,

Well, unregister_mem_sect_under_nodes() __only__ gets called from remove_memory_section().
But remove_memory_section() only calls unregister_mem_sect_under_nodes() IFF mem_blk
is not NULL:

static int remove_memory_section
{
	...
	mem = find_memory_block(section);
	if (!mem)
		goto out_unlock;

	unregister_mem_sect_under_nodes(mem, __section_nr(section));
	...
}

So, to me keeping the check is redundant, as we already check for it before calling in.

Thanks
-- 
Oscar Salvador
SUSE L3