linux-kernel - Re: drivers/soc/fsl/qe/qmc.c:2002:30: warning: unused variable 'qmc_data

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Message-ID: <20240923133818.03cc9327@bootlin.com>
Date: Mon, 23 Sep 2024 13:38:18 +0200
From: Herve Codina <herve.codina@...tlin.com>
To: kernel test robot <lkp@...el.com>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org, Christophe
 Leroy <christophe.leroy@...roup.eu>
Subject: Re: drivers/soc/fsl/qe/qmc.c:2002:30: warning: unused variable
 'qmc_data_qe'

Hi,

On Mon, 23 Sep 2024 12:53:23 +0800
kernel test robot <lkp@...el.com> wrote:

> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   de5cb0dcb74c294ec527eddfe5094acfdb21ff21
> commit: eb680d563089e55b20cb7730ed881638fe4425b7 soc: fsl: cpm1: qmc: Add support for QUICC Engine (QE) implementation
> date:   3 weeks ago
> config: powerpc-randconfig-r054-20240923 (https://download.01.org/0day-ci/archive/20240923/202409231229.EFlvN9m0-lkp@intel.com/config)
> compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project 8663a75fa2f31299ab8d1d90288d9df92aadee88)
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240923/202409231229.EFlvN9m0-lkp@intel.com/reproduce)
> 
> 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>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202409231229.EFlvN9m0-lkp@intel.com/
> 
> All warnings (new ones prefixed by >>):
> 
>    In file included from drivers/soc/fsl/qe/qmc.c:12:
>    In file included from include/linux/dma-mapping.h:11:
>    In file included from include/linux/scatterlist.h:8:
>    In file included from include/linux/mm.h:2228:
>    include/linux/vmstat.h:514:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
>      514 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
>          |                               ~~~~~~~~~~~ ^ ~~~
> >> drivers/soc/fsl/qe/qmc.c:2002:30: warning: unused variable 'qmc_data_qe' [-Wunused-const-variable]  
>     2002 | static const struct qmc_data qmc_data_qe = {
>          |                              ^~~~~~~~~~~
>    2 warnings generated.
> 
> 
> vim +/qmc_data_qe +2002 drivers/soc/fsl/qe/qmc.c
> 
>   2001	
> > 2002	static const struct qmc_data qmc_data_qe = {  
>   2003		.version = QMC_QE,
>   2004		.tstate = 0x30000000,
>   2005		.rstate = 0x30000000,
>   2006		.zistate = 0x00000200,
>   2007		.zdstate_hdlc = 0x80FFFFE0,
>   2008		.zdstate_transp = 0x003FFFE2,
>   2009		.rpack = 0x80000000,
>   2010	};
>   2011	
> 

This issue has been already detected:
  https://lore.kernel.org/oe-kbuild-all/202409071707.ou2KFNKO-lkp@intel.com/
and a patch has been already sent to fix it:
  https://lore.kernel.org/lkml/20240909121129.57067-1-herve.codina@bootlin.com/

Best regards,
Hervé