linux-kernel - Re: [PATCH v7 09/13] coresight-tpdm: Add nodes for dsb edge control

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Date:   Wed, 26 Jul 2023 06:00:41 +0800
From:   kernel test robot <lkp@...el.com>
To:     Tao Zhang <quic_taozha@...cinc.com>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Konrad Dybcio <konradybcio@...il.com>,
        Mike Leach <mike.leach@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>
Cc:     llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
        Tao Zhang <quic_taozha@...cinc.com>,
        Jinlong Mao <quic_jinlmao@...cinc.com>,
        Leo Yan <leo.yan@...aro.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        coresight@...ts.linaro.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        Tingwei Zhang <quic_tingweiz@...cinc.com>,
        Yuanfang Zhang <quic_yuanfang@...cinc.com>,
        Trilok Soni <quic_tsoni@...cinc.com>,
        Hao Zhang <quic_hazha@...cinc.com>,
        linux-arm-msm@...r.kernel.org, andersson@...nel.org
Subject: Re: [PATCH v7 09/13] coresight-tpdm: Add nodes for dsb edge control

Hi Tao,

kernel test robot noticed the following build warnings:

[auto build test WARNING on robh/for-next]
[also build test WARNING on linus/master v6.5-rc3 next-20230725]
[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/Tao-Zhang/coresight-tpdm-Remove-the-unnecessary-lock/20230725-152235
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
patch link:    https://lore.kernel.org/r/1690269353-10829-10-git-send-email-quic_taozha%40quicinc.com
patch subject: [PATCH v7 09/13] coresight-tpdm: Add nodes for dsb edge control
config: arm-randconfig-r013-20230725 (https://download.01.org/0day-ci/archive/20230726/202307260533.MTqa5ObG-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
reproduce: (https://download.01.org/0day-ci/archive/20230726/202307260533.MTqa5ObG-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/202307260533.MTqa5ObG-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/hwtracing/coresight/coresight-tpdm.c:383:21: warning: variable 'mask' set but not used [-Wunused-but-set-variable]
     383 |         unsigned long val, mask, edge_ctrl;
         |                            ^
>> drivers/hwtracing/coresight/coresight-tpdm.c:451:3: warning: misleading indentation; statement is not part of the previous 'else' [-Wmisleading-indentation]
     451 |                 drvdata->dsb->edge_ctrl_mask[reg] = set;
         |                 ^
   drivers/hwtracing/coresight/coresight-tpdm.c:449:2: note: previous statement is here
     449 |         else
         |         ^
   2 warnings generated.


vim +/else +451 drivers/hwtracing/coresight/coresight-tpdm.c

   426	
   427	static ssize_t dsb_edge_ctrl_mask_store(struct device *dev,
   428						     struct device_attribute *attr,
   429						     const char *buf,
   430						     size_t size)
   431	{
   432		struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
   433		unsigned long val;
   434		u32 set;
   435		int reg;
   436	
   437		if ((kstrtoul(buf, 0, &val)) || (val & ~1UL))
   438			return -EINVAL;
   439	
   440		spin_lock(&drvdata->spinlock);
   441		/*
   442		 * There is 1 bit per DSB Edge Control Mark line.
   443		 * Thus we have 32 lines in a 32bit word.
   444		 */
   445		reg = EDCMR_TO_WORD_IDX(drvdata->dsb->edge_ctrl_idx);
   446		set = drvdata->dsb->edge_ctrl_mask[reg];
   447		if (val)
   448			set |= BIT(EDCMR_TO_WORD_SHIFT(drvdata->dsb->edge_ctrl_idx));
   449		else
   450			set &= ~BIT(EDCMR_TO_WORD_SHIFT(drvdata->dsb->edge_ctrl_idx));
 > 451			drvdata->dsb->edge_ctrl_mask[reg] = set;
   452		spin_unlock(&drvdata->spinlock);
   453	
   454		return size;
   455	}
   456	static DEVICE_ATTR_RW(dsb_edge_ctrl_mask);
   457	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki