[PATCHv2 1/3] block: introduce rq_list_for_each_safe macro

[Max Gurtovoy]

On 12/29/2021 10:57 PM, Keith Busch wrote:
> On Wed, Dec 29, 2021 at 06:39:02PM +0100, Christoph Hellwig wrote:
>> (except for the fact that it, just like the other rq_list helpers
>> really should go into blk-mq.h, where all request related bits moved
>> early in this cycle)
> Agreed, I just put it here because it's where the other macros live. But
> 'struct request' doesn't exist in this header, so it does seem out of
> place.  For v3, I'll add a preceding patch to move them all to blk-mq.h.

Did you see the discussion I had with Jens ?

Seems it works only for non-shared tagsets and it means that it will 
work only for NVMe devices that have 1 namespace and will not work for 
NVMf drivers.

Unless, we'll do some changes in the block layer and/or remove this 
condition.