[linux-next:master 5968/11353] drivers/clk/mediatek/clk-pll.c:418:23: warning: variable 'base' set but not used

[kernel test robot <lkp@intel.com>]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   cb153b68ff91cbc434f3de70ac549e110543e1bb
commit: 6dd199064dd86127030b5bc59d4058370b6c8310 [5968/11353] clk: mediatek: pll: Implement unregister API
config: sh-randconfig-r002-20220308 (https://download.01.org/0day-ci/archive/20220309/202203090714.kf7arAXf-lkp@intel.com/config)
compiler: sh4-linux-gcc (GCC) 11.2.0
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/next/linux-next.git/commit/?id=6dd199064dd86127030b5bc59d4058370b6c8310
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout 6dd199064dd86127030b5bc59d4058370b6c8310
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=sh SHELL=/bin/bash drivers/clk/mediatek/

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

All warnings (new ones prefixed by >>):

   drivers/clk/mediatek/clk-pll.c: In function 'mtk_clk_unregister_plls':
>> drivers/clk/mediatek/clk-pll.c:418:23: warning: variable 'base' set but not used [-Wunused-but-set-variable]
     418 |         __iomem void *base = NULL;
         |                       ^~~~


vim +/base +418 drivers/clk/mediatek/clk-pll.c

   414	
   415	void mtk_clk_unregister_plls(const struct mtk_pll_data *plls, int num_plls,
   416				     struct clk_onecell_data *clk_data)
   417	{
 > 418		__iomem void *base = NULL;
   419		int i;
   420	
   421		if (!clk_data)
   422			return;
   423	
   424		for (i = num_plls; i > 0; i--) {
   425			const struct mtk_pll_data *pll = &plls[i - 1];
   426	
   427			if (IS_ERR_OR_NULL(clk_data->clks[pll->id]))
   428				continue;
   429	
   430			/*
   431			 * This is quite ugly but unfortunately the clks don't have
   432			 * any device tied to them, so there's no place to store the
   433			 * pointer to the I/O region base address. We have to fetch
   434			 * it from one of the registered clks.
   435			 */
   436			base = mtk_clk_pll_get_base(clk_data->clks[pll->id], pll);
   437	
   438			mtk_clk_unregister_pll(clk_data->clks[pll->id]);
   439			clk_data->clks[pll->id] = ERR_PTR(-ENOENT);
   440		}
   441	
   442		iounmap(base);
   443	}
   444	EXPORT_SYMBOL_GPL(mtk_clk_unregister_plls);
   445	

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