linux-kernel - Re: [PATCH v2] coresight: Make current W=1 warnings default

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Date:   Tue, 5 Dec 2023 09:11:03 +0000
From:   James Clark <james.clark@....com>
To:     kernel test robot <lkp@...el.com>, coresight@...ts.linaro.org,
        suzuki.poulose@....com
Cc:     oe-kbuild-all@...ts.linux.dev, Mike Leach <mike.leach@...aro.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com
Subject: Re: [PATCH v2] coresight: Make current W=1 warnings default



On 04/12/2023 18:37, kernel test robot wrote:
> Hi James,
> 
> kernel test robot noticed the following build warnings:
> 
> [auto build test WARNING on atorgue-stm32/stm32-next]
> [also build test WARNING on linus/master v6.7-rc4 next-20231204]
> [If your patch is applied to the wrong git tree, kindly drop us a note.
> And when submitting patch, we suggest to use '--base' as documented in
> https://git-scm.com/docs/git-format-patch#_base_tree_information]
> 
> url:    https://github.com/intel-lab-lkp/linux/commits/James-Clark/coresight-Make-current-W-1-warnings-default/20231116-004818
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/atorgue/stm32.git stm32-next
> patch link:    https://lore.kernel.org/r/20231115162834.355598-1-james.clark%40arm.com
> patch subject: [PATCH v2] coresight: Make current W=1 warnings default
> config: arm-randconfig-r131-20231117 (https://download.01.org/0day-ci/archive/20231205/202312050158.FKpxuafP-lkp@intel.com/config)
> compiler: arm-linux-gnueabi-gcc (GCC) 13.2.0
> reproduce: (https://download.01.org/0day-ci/archive/20231205/202312050158.FKpxuafP-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/202312050158.FKpxuafP-lkp@intel.com/
> 
> sparse warnings: (new ones prefixed by >>)
>>> drivers/hwtracing/coresight/coresight-etb10.c:840:17: sparse: sparse: Using plain integer as NULL pointer
>    drivers/hwtracing/coresight/coresight-etb10.c: note: in included file (through include/linux/mmzone.h, include/linux/gfp.h, include/linux/xarray.h, ...):
>    include/linux/page-flags.h:242:46: sparse: sparse: self-comparison always evaluates to false
> --
>>> drivers/hwtracing/coresight/coresight-funnel.c:395:17: sparse: sparse: Using plain integer as NULL pointer
>    drivers/hwtracing/coresight/coresight-funnel.c: note: in included file (through include/linux/mmzone.h, include/linux/gfp.h, include/linux/slab.h, ...):
>    include/linux/page-flags.h:242:46: sparse: sparse: self-comparison always evaluates to false
> --
>>> drivers/hwtracing/coresight/coresight-tpdm.c:242:17: sparse: sparse: Using plain integer as NULL pointer
>    drivers/hwtracing/coresight/coresight-tpdm.c: note: in included file (through include/linux/mmzone.h, include/linux/gfp.h, include/linux/xarray.h, ...):
>    include/linux/page-flags.h:242:46: sparse: sparse: self-comparison always evaluates to false
> 
> vim +840 drivers/hwtracing/coresight/coresight-etb10.c
> 
>    834	
>    835	static const struct amba_id etb_ids[] = {
>    836		{
>    837			.id	= 0x000bb907,
>    838			.mask	= 0x000fffff,
>    839		},
>  > 840		{ 0, 0, 0 },
>    841	};
>    842	
> 

This should already be fixed in V3 here:

https://lore.kernel.org/linux-arm-kernel/20231123120459.287578-1-james.clark@arm.com/