Re: [PATCH v2 7/8] mm/memory_hotplug: Make unregister_memory_block_under_nodes() never fail

[David Hildenbrand <david@xxxxxxxxxx>]

>>  drivers/base/node.c  | 18 +++++-------------
>>  include/linux/node.h |  5 ++---
>>  2 files changed, 7 insertions(+), 16 deletions(-)
>>
>> diff --git a/drivers/base/node.c b/drivers/base/node.c
>> index 04fdfa99b8bc..9be88fd05147 100644
>> --- a/drivers/base/node.c
>> +++ b/drivers/base/node.c
>> @@ -803,20 +803,14 @@ int register_mem_sect_under_node(struct memory_block *mem_blk, void *arg)
>>
>>  /*
>>   * Unregister memory block device under all nodes that it spans.
>> + * Has to be called with mem_sysfs_mutex held (due to unlinked_nodes).
> 
> Given this comment can bitrot relative to the implementation lets
> instead add an explicit:
> 
>     lockdep_assert_held(&mem_sysfs_mutex);

That would require to make the mutex non-static. Is that what you
suggest, or any other alternative?

Thanks Dan!

> 
> With that you can add:
> 
> Reviewed-by: Dan Williams <dan.j.williams@xxxxxxxxx>
> 


-- 

Thanks,

David / dhildenb