linux-kernel - drivers/pinctrl/intel/pinctrl-intel.c:1663:14: warning: variable 'dummy' set but not used

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Date:   Wed, 28 Apr 2021 08:10:34 +0800
From:   kernel test robot <lkp@...el.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
        linux-kernel@...r.kernel.org
Subject: drivers/pinctrl/intel/pinctrl-intel.c:1663:14: warning: variable
 'dummy' set but not used

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   e359bce39d9085ab24eaa0bb0778bb5f6894144a
commit: 10c857f063fc63902160755a6e23fa594290c6d3 pinctrl: cherryview: Switch to use intel_pinctrl_get_soc_data()
date:   8 months ago
config: x86_64-randconfig-a005-20210426 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 87fc97169e7901dfe56ca0da0d92da0c02d2ef48)
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
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=10c857f063fc63902160755a6e23fa594290c6d3
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 10c857f063fc63902160755a6e23fa594290c6d3
        # 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/pinctrl/intel/pinctrl-intel.c:1663:14: warning: variable 'dummy' set but not used [-Wunused-but-set-variable]
           const char *dummy;
                       ^
   1 warning generated.


vim +/dummy +1663 drivers/pinctrl/intel/pinctrl-intel.c

a0a5f7661e1c49 Chris Chiu      2019-04-15  1656  
7101e022523bfb Andy Shevchenko 2019-10-22  1657  static void intel_restore_hostown(struct intel_pinctrl *pctrl, unsigned int c,
7101e022523bfb Andy Shevchenko 2019-10-22  1658  				  void __iomem *base, unsigned int gpp, u32 saved)
7101e022523bfb Andy Shevchenko 2019-10-22  1659  {
7101e022523bfb Andy Shevchenko 2019-10-22  1660  	const struct intel_community *community = &pctrl->communities[c];
7101e022523bfb Andy Shevchenko 2019-10-22  1661  	const struct intel_padgroup *padgrp = &community->gpps[gpp];
7101e022523bfb Andy Shevchenko 2019-10-22  1662  	struct device *dev = pctrl->dev;
d1bfd0229ec4de Andy Shevchenko 2020-06-10 @1663  	const char *dummy;
d1bfd0229ec4de Andy Shevchenko 2020-06-10  1664  	u32 requested = 0;
d1bfd0229ec4de Andy Shevchenko 2020-06-10  1665  	unsigned int i;
7101e022523bfb Andy Shevchenko 2019-10-22  1666  
e5a4ab6a55e230 Andy Shevchenko 2020-04-13  1667  	if (padgrp->gpio_base == INTEL_GPIO_BASE_NOMAP)
7101e022523bfb Andy Shevchenko 2019-10-22  1668  		return;
7101e022523bfb Andy Shevchenko 2019-10-22  1669  
d1bfd0229ec4de Andy Shevchenko 2020-06-10  1670  	for_each_requested_gpio_in_range(&pctrl->chip, i, padgrp->gpio_base, padgrp->size, dummy)
d1bfd0229ec4de Andy Shevchenko 2020-06-10  1671  		requested |= BIT(i);
d1bfd0229ec4de Andy Shevchenko 2020-06-10  1672  
942c5ea49ffbe2 Andy Shevchenko 2019-10-22  1673  	if (!intel_gpio_update_reg(base + gpp * 4, requested, saved))
7101e022523bfb Andy Shevchenko 2019-10-22  1674  		return;
7101e022523bfb Andy Shevchenko 2019-10-22  1675  
764cfe33517f7c Andy Shevchenko 2019-10-22  1676  	dev_dbg(dev, "restored hostown %u/%u %#08x\n", c, gpp, readl(base + gpp * 4));
7101e022523bfb Andy Shevchenko 2019-10-22  1677  }
7101e022523bfb Andy Shevchenko 2019-10-22  1678  

:::::: The code at line 1663 was first introduced by commit
:::::: d1bfd0229ec4deb53e61f95c050b524152fd0d9e pinctrl: intel: Make use of for_each_requested_gpio_in_range()

:::::: TO: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
:::::: CC: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

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

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