linux-kernel - drivers/net/wireless/mediatek/mt76/debugfs.c:77:9: warning: variable 'queued' set but not used

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Message-ID: <202111190424.JzkIDjVb-lkp@intel.com>
Date:   Fri, 19 Nov 2021 04:43:36 +0800
From:   kernel test robot <lkp@...el.com>
To:     Sean Wang <sean.wang@...iatek.com>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org, Felix Fietkau <nbd@....name>,
        Lorenzo Bianconi <lorenzo@...nel.org>
Subject: drivers/net/wireless/mediatek/mt76/debugfs.c:77:9: warning: variable
 'queued' set but not used

Hi Sean,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   42eb8fdac2fc5d62392dcfcf0253753e821a97b0
commit: 48fab5bbef4092d925ab3214773ad12e68807223 mt76: mt7921: introduce mt7921s support
date:   4 weeks ago
config: x86_64-randconfig-a006-20211118 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project c46becf500df2a7fb4b4fce16178a036c344315a)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=48fab5bbef4092d925ab3214773ad12e68807223
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 48fab5bbef4092d925ab3214773ad12e68807223
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> drivers/net/wireless/mediatek/mt76/debugfs.c:77:9: warning: variable 'queued' set but not used [-Wunused-but-set-variable]
           int i, queued;
                  ^
   1 warning generated.


vim +/queued +77 drivers/net/wireless/mediatek/mt76/debugfs.c

17f1de56df0512 Felix Fietkau    2017-11-21  73  
6ea62c50792c6a Lorenzo Bianconi 2020-04-19  74  static int mt76_rx_queues_read(struct seq_file *s, void *data)
6ea62c50792c6a Lorenzo Bianconi 2020-04-19  75  {
6ea62c50792c6a Lorenzo Bianconi 2020-04-19  76  	struct mt76_dev *dev = dev_get_drvdata(s->private);
6ea62c50792c6a Lorenzo Bianconi 2020-04-19 @77  	int i, queued;
6ea62c50792c6a Lorenzo Bianconi 2020-04-19  78  
2d8be76c16746f Lorenzo Bianconi 2021-09-25  79  	seq_puts(s, "     queue | hw-queued |      head |      tail |\n");
f473b42ac516be Felix Fietkau    2020-05-24  80  	mt76_for_each_q_rx(dev, i) {
6ea62c50792c6a Lorenzo Bianconi 2020-04-19  81  		struct mt76_queue *q = &dev->q_rx[i];
6ea62c50792c6a Lorenzo Bianconi 2020-04-19  82  
6ea62c50792c6a Lorenzo Bianconi 2020-04-19  83  		queued = mt76_is_usb(dev) ? q->ndesc - q->queued : q->queued;
2d8be76c16746f Lorenzo Bianconi 2021-09-25  84  		seq_printf(s, " %9d | %9d | %9d | %9d |\n",
2d8be76c16746f Lorenzo Bianconi 2021-09-25  85  			   i, q->queued, q->head, q->tail);
6ea62c50792c6a Lorenzo Bianconi 2020-04-19  86  	}
6ea62c50792c6a Lorenzo Bianconi 2020-04-19  87  
6ea62c50792c6a Lorenzo Bianconi 2020-04-19  88  	return 0;
6ea62c50792c6a Lorenzo Bianconi 2020-04-19  89  }
6ea62c50792c6a Lorenzo Bianconi 2020-04-19  90  

:::::: The code at line 77 was first introduced by commit
:::::: 6ea62c50792c6ad8b283c02d19f4304c7f3a3ccf mt76: add rx queues info to mt76 debugfs

:::::: TO: Lorenzo Bianconi <lorenzo@...nel.org>
:::::: CC: Felix Fietkau <nbd@....name>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

Download attachment ".config.gz" of type "application/gzip" (34736 bytes)