linux-kernel - [kbingham-rcar:kbingham/vsp1/debugfs 3/7] drivers/media/platform/renesas/vsp1/vsp1_debugfs.c:471:24: warning: variable 'info

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Date:   Wed, 29 Jun 2022 21:42:52 +0800
From:   kernel test robot <lkp@...el.com>
To:     Kieran Bingham <kieran.bingham+renesas@...asonboard.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [kbingham-rcar:kbingham/vsp1/debugfs 3/7]
 drivers/media/platform/renesas/vsp1/vsp1_debugfs.c:471:24: warning: variable
 'info_file' set but not used

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/kbingham/rcar.git kbingham/vsp1/debugfs
head:   73e1dae0c0afd4ccbe318e1bc9881b3e800226ba
commit: 7fd316488de68da21571b26aef5c60524a9c651b [3/7] v4l: vsp1: Add debugfs system v1.8
config: mips-allyesconfig
compiler: mips-linux-gcc (GCC) 11.3.0
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/kbingham/rcar.git/commit/?id=7fd316488de68da21571b26aef5c60524a9c651b
        git remote add kbingham-rcar https://git.kernel.org/pub/scm/linux/kernel/git/kbingham/rcar.git
        git fetch --no-tags kbingham-rcar kbingham/vsp1/debugfs
        git checkout 7fd316488de68da21571b26aef5c60524a9c651b
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash drivers/media/platform/renesas/vsp1/

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

All warnings (new ones prefixed by >>):

   drivers/media/platform/renesas/vsp1/vsp1_debugfs.c: In function 'vsp1_debugfs_info':
   drivers/media/platform/renesas/vsp1/vsp1_debugfs.c:371:66: error: 'VI6_WPF0_FRCNT' undeclared (first use in this function)
     371 |         seq_printf(s, "VI6_WPF0_FRCNT = 0x%08x", vsp1_read(vsp1, VI6_WPF0_FRCNT));
         |                                                                  ^~~~~~~~~~~~~~
   drivers/media/platform/renesas/vsp1/vsp1_debugfs.c:371:66: note: each undeclared identifier is reported only once for each function it appears in
   drivers/media/platform/renesas/vsp1/vsp1_debugfs.c: In function 'vsp1_debugfs_init':
>> drivers/media/platform/renesas/vsp1/vsp1_debugfs.c:471:24: warning: variable 'info_file' set but not used [-Wunused-but-set-variable]
     471 |         struct dentry *info_file;
         |                        ^~~~~~~~~
   At top level:
   drivers/media/platform/renesas/vsp1/vsp1_debugfs.c:311:13: warning: 'vsp1_reg_read_and_decode' defined but not used [-Wunused-function]
     311 | static void vsp1_reg_read_and_decode(struct vsp1_device *vsp1,
         |             ^~~~~~~~~~~~~~~~~~~~~~~~
   drivers/media/platform/renesas/vsp1/vsp1_debugfs.c:281:12: warning: 'vsp1_reg_decode' defined but not used [-Wunused-function]
     281 | static int vsp1_reg_decode(struct seq_file *s, u32 offset, u32 value)
         |            ^~~~~~~~~~~~~~~


vim +/info_file +471 drivers/media/platform/renesas/vsp1/vsp1_debugfs.c

   467	
   468	/* Debugfs initialised after entities are created */
   469	int vsp1_debugfs_init(struct vsp1_device *vsp1)
   470	{
 > 471		struct dentry *info_file;
   472	
   473		vsp1->regset.regs = vsp1_regset;
   474		vsp1->regset.base = vsp1->mmio;
   475		vsp1->regset.nregs = ARRAY_SIZE(vsp1_regset);
   476	
   477		vsp1->dbgroot = debugfs_create_dir(dev_name(vsp1->dev), NULL);
   478		if (!vsp1->dbgroot)
   479			return -ENOMEM;
   480	
   481		/* dentry pointer discarded */
   482		info_file = debugfs_create_file("info", 0444,
   483							 vsp1->dbgroot,
   484							 vsp1,
   485							 &vsp1_debugfs_info_fops);
   486	
   487		/* dentry pointer discarded */
   488		info_file = debugfs_create_file("regs_local", 0444,
   489							 vsp1->dbgroot,
   490							 vsp1,
   491							 &vsp1_debugfs_regs_fops);
   492	
   493		/* dentry pointer discarded */
   494		info_file = debugfs_create_file("reset_wpf0", 0444,
   495							 vsp1->dbgroot,
   496							 vsp1,
   497							 &vsp1_debugfs_reset_wpf_fops);
   498	
   499		debugfs_create_regset32("regs", 0444, vsp1->dbgroot, &vsp1->regset);
   500	
   501		return 0;
   502	}
   503	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp

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