linux-kernel - Re: [PATCH 09/10] writeback: factor out wb_dirty

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Date: Mon, 6 May 2024 10:15:09 +0800
From: Kemeng Shi <shikemeng@...weicloud.com>
To: Dan Carpenter <dan.carpenter@...aro.org>, oe-kbuild@...ts.linux.dev,
 willy@...radead.org, akpm@...ux-foundation.org, jack@...e.cz, tj@...nel.org
Cc: lkp@...el.com, oe-kbuild-all@...ts.linux.dev,
 linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH 09/10] writeback: factor out wb_dirty_exceeded to remove
 repeated code


on 4/30/2024 3:24 PM, Dan Carpenter wrote:
> Hi Kemeng,
> 
> kernel test robot noticed the following build warnings:
> 
> https://git-scm.com/docs/git-format-patch#_base_tree_information]
> 
> url:    https://github.com/intel-lab-lkp/linux/commits/Kemeng-Shi/writeback-factor-out-wb_bg_dirty_limits-to-remove-repeated-code/20240429-114903
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
> patch link:    https://lore.kernel.org/r/20240429034738.138609-10-shikemeng%40huaweicloud.com
> patch subject: [PATCH 09/10] writeback: factor out wb_dirty_exceeded to remove repeated code
> config: i386-randconfig-141-20240429 (https://download.01.org/0day-ci/archive/20240430/202404300231.bnb28iB8-lkp@intel.com/config)
> compiler: gcc-13 (Ubuntu 13.2.0-4ubuntu3) 13.2.0
> 
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@...el.com>
> | Reported-by: Dan Carpenter <dan.carpenter@...aro.org>
> | Closes: https://lore.kernel.org/r/202404300231.bnb28iB8-lkp@intel.com/
> 
> New smatch warnings:
> mm/page-writeback.c:1903 balance_dirty_pages() error: we previously assumed 'mdtc' could be null (see line 1886)
Will fix this in next version. Thanks a lot for the report.

Kemeng