Re: [PATCH v2 4/5] blk-iocost: fix sleeping in atomic context warnning

[Christoph Hellwig]

On Fri, Nov 04, 2022 at 10:39:37AM +0800, Yu Kuai wrote:
> From: Yu Kuai <yukuai3@xxxxxxxxxx>
> 
> match_u64() is called inside ioc->lock, which causes smatch static
> checker warnings:
> 
> block/blk-iocost.c:3211 ioc_qos_write() warn: sleeping in atomic context
> block/blk-iocost.c:3240 ioc_qos_write() warn: sleeping in atomic context
> block/blk-iocost.c:3407 ioc_cost_model_write() warn: sleeping in atomic
> context
> 
> Fix the problem by introducing a mutex and using it while prasing input
> params.

s/prasing/parsing/

Otherwise looks good:

Reviewed-by: Christoph Hellwig <hch@xxxxxx>