Hi Nobuhiro,

I love your patch! Perhaps something to improve:

[auto build test WARNING on clk/clk-next]
[also build test WARNING on robh/for-next pza/reset/next linus/master v5.13-rc3 next-20210525]
[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]

url:    https://github.com/0day-ci/linux/commits/Nobuhiro-Iwamatsu/clk-visconti-Add-support-common-clock-driver-and-reset-driver/20210525-165001
base:   https://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git clk-next
config: arm64-randconfig-r004-20210525 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 99155e913e9bad5f7f8a247f8bb3a3ff3da74af1)
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 arm64 cross compiling tool for clang build
        # apt-get install binutils-aarch64-linux-gnu
        # https://github.com/0day-ci/linux/commit/33e59a6bce486f3cb2bd6f9f4ed2f73a94769196
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Nobuhiro-Iwamatsu/clk-visconti-Add-support-common-clock-driver-and-reset-driver/20210525-165001
        git checkout 33e59a6bce486f3cb2bd6f9f4ed2f73a94769196
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 

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/visconti/pll.c:260:13: warning: no previous prototype for function 'visconti_register_pll' [-Wmissing-prototypes]
   struct clk *visconti_register_pll(struct visconti_pll_provider *ctx,
               ^
   drivers/clk/visconti/pll.c:260:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   struct clk *visconti_register_pll(struct visconti_pll_provider *ctx,
   ^
   static 
   1 warning generated.


vim +/visconti_register_pll +260 drivers/clk/visconti/pll.c

   259	
 > 260	struct clk *visconti_register_pll(struct visconti_pll_provider *ctx,
   261					  const char *name,
   262					  const char *parent_name,
   263					  int offset,
   264					  const struct visconti_pll_rate_table *rate_table,
   265					  u8 clk_pll_flags,
   266					  spinlock_t *lock)
   267	{
   268		struct clk_init_data init;
   269		struct visconti_pll *pll;
   270		struct clk *pll_clk;
   271		int len;
   272	
   273		pll = kzalloc(sizeof(*pll), GFP_KERNEL);
   274		if (!pll)
   275			return ERR_PTR(-ENOMEM);
   276	
   277		/* Create the actual pll */
   278		init.name = name;
   279		init.flags = CLK_IGNORE_UNUSED;
   280		init.parent_names = &parent_name;
   281		init.num_parents = 1;
   282	
   283		for (len = 0; rate_table[len].rate != 0; )
   284			len++;
   285		pll->rate_count = len;
   286		pll->rate_table = kmemdup(rate_table,
   287					  pll->rate_count * sizeof(struct visconti_pll_rate_table),
   288					  GFP_KERNEL);
   289		WARN(!pll->rate_table, "%s: could not allocate rate table for %s\n", __func__, name);
   290	
   291		init.ops = &visconti_pll_ops;
   292		pll->hw.init = &init;
   293		pll->pll_base = ctx->reg_base + offset;
   294		pll->flags = clk_pll_flags;
   295		pll->lock = lock;
   296		pll->ctx = ctx;
   297	
   298		pll_clk = clk_register(NULL, &pll->hw);
   299		if (IS_ERR(pll_clk)) {
   300			pr_err("failed to register pll clock %s : %ld\n", name, PTR_ERR(pll_clk));
   301			goto err;
   302		}
   303	
   304		return pll_clk;
   305	
   306	err:
   307		kfree(pll);
   308		return pll_clk;
   309	}
   310	

---
0-DAY CI Kernel Test Service, Intel Corporation
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