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Date:   Wed, 3 Aug 2022 18:53:02 +0800
From:   kernel test robot <lkp@...el.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org
Subject: arch/arm/mach-spear/spear6xx.c:365:13: warning: no previous
 prototype for function 'spear6xx_map_io'

Hi Arnd,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   e2b542100719a93f8cdf6d90185410d38a57a4c1
commit: a3102fafdce6f150e5a46e1725bb1732f8953a01 ARM: iop32x: enable multiplatform support
date:   4 months ago
config: arm-randconfig-r014-20220803 (https://download.01.org/0day-ci/archive/20220803/202208031821.79T1lZAO-lkp@intel.com/config)
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 52cd00cabf479aa7eb6dbb063b7ba41ea57bce9e)
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 arm cross compiling tool for clang build
        # apt-get install binutils-arm-linux-gnueabi
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a3102fafdce6f150e5a46e1725bb1732f8953a01
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout a3102fafdce6f150e5a46e1725bb1732f8953a01
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash arch/arm/mach-spear/ drivers/clk/spear/

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 >>):

>> arch/arm/mach-spear/spear6xx.c:365:13: warning: no previous prototype for function 'spear6xx_map_io' [-Wmissing-prototypes]
   void __init spear6xx_map_io(void)
               ^
   arch/arm/mach-spear/spear6xx.c:365:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void __init spear6xx_map_io(void)
   ^
   static 
>> arch/arm/mach-spear/spear6xx.c:370:13: warning: no previous prototype for function 'spear6xx_timer_init' [-Wmissing-prototypes]
   void __init spear6xx_timer_init(void)
               ^
   arch/arm/mach-spear/spear6xx.c:370:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void __init spear6xx_timer_init(void)
   ^
   static 
   2 warnings generated.
--
>> drivers/clk/spear/spear6xx_clock.c:116:13: warning: no previous prototype for function 'spear6xx_clk_init' [-Wmissing-prototypes]
   void __init spear6xx_clk_init(void __iomem *misc_base)
               ^
   drivers/clk/spear/spear6xx_clock.c:116:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void __init spear6xx_clk_init(void __iomem *misc_base)
   ^
   static 
   1 warning generated.


vim +/spear6xx_map_io +365 arch/arm/mach-spear/spear6xx.c

8f590d4541fb67 arch/arm/mach-spear6xx/spear6xx.c Viresh Kumar      2010-04-01  363  
8f590d4541fb67 arch/arm/mach-spear6xx/spear6xx.c Viresh Kumar      2010-04-01  364  /* This will create static memory mapping for selected devices */
8f590d4541fb67 arch/arm/mach-spear6xx/spear6xx.c Viresh Kumar      2010-04-01 @365  void __init spear6xx_map_io(void)
8f590d4541fb67 arch/arm/mach-spear6xx/spear6xx.c Viresh Kumar      2010-04-01  366  {
8f590d4541fb67 arch/arm/mach-spear6xx/spear6xx.c Viresh Kumar      2010-04-01  367  	iotable_init(spear6xx_io_desc, ARRAY_SIZE(spear6xx_io_desc));
8f590d4541fb67 arch/arm/mach-spear6xx/spear6xx.c Viresh Kumar      2010-04-01  368  }
5c881d9ae94801 arch/arm/mach-spear6xx/spear6xx.c Shiraz Hashim     2011-02-16  369  
6bb27d7349db51 arch/arm/mach-spear6xx/spear6xx.c Stephen Warren    2012-11-08 @370  void __init spear6xx_timer_init(void)
5c881d9ae94801 arch/arm/mach-spear6xx/spear6xx.c Shiraz Hashim     2011-02-16  371  {
a8f4bf0eb4ca7a arch/arm/mach-spear6xx/spear6xx.c Vipul Kumar Samar 2012-07-10  372  	char pclk_name[] = "pll3_clk";
5c881d9ae94801 arch/arm/mach-spear6xx/spear6xx.c Shiraz Hashim     2011-02-16  373  	struct clk *gpt_clk, *pclk;
5c881d9ae94801 arch/arm/mach-spear6xx/spear6xx.c Shiraz Hashim     2011-02-16  374  
d9909ebe650f02 arch/arm/mach-spear/spear6xx.c    Arnd Bergmann     2012-12-02  375  	spear6xx_clk_init(MISC_BASE);
5df33a62c4a028 arch/arm/mach-spear6xx/spear6xx.c Viresh Kumar      2012-04-10  376  
5c881d9ae94801 arch/arm/mach-spear6xx/spear6xx.c Shiraz Hashim     2011-02-16  377  	/* get the system timer clock */
5c881d9ae94801 arch/arm/mach-spear6xx/spear6xx.c Shiraz Hashim     2011-02-16  378  	gpt_clk = clk_get_sys("gpt0", NULL);
5c881d9ae94801 arch/arm/mach-spear6xx/spear6xx.c Shiraz Hashim     2011-02-16  379  	if (IS_ERR(gpt_clk)) {
5c881d9ae94801 arch/arm/mach-spear6xx/spear6xx.c Shiraz Hashim     2011-02-16  380  		pr_err("%s:couldn't get clk for gpt\n", __func__);
5c881d9ae94801 arch/arm/mach-spear6xx/spear6xx.c Shiraz Hashim     2011-02-16  381  		BUG();
5c881d9ae94801 arch/arm/mach-spear6xx/spear6xx.c Shiraz Hashim     2011-02-16  382  	}
5c881d9ae94801 arch/arm/mach-spear6xx/spear6xx.c Shiraz Hashim     2011-02-16  383  
5c881d9ae94801 arch/arm/mach-spear6xx/spear6xx.c Shiraz Hashim     2011-02-16  384  	/* get the suitable parent clock for timer*/
5c881d9ae94801 arch/arm/mach-spear6xx/spear6xx.c Shiraz Hashim     2011-02-16  385  	pclk = clk_get(NULL, pclk_name);
5c881d9ae94801 arch/arm/mach-spear6xx/spear6xx.c Shiraz Hashim     2011-02-16  386  	if (IS_ERR(pclk)) {
5c881d9ae94801 arch/arm/mach-spear6xx/spear6xx.c Shiraz Hashim     2011-02-16  387  		pr_err("%s:couldn't get %s as parent for gpt\n",
5c881d9ae94801 arch/arm/mach-spear6xx/spear6xx.c Shiraz Hashim     2011-02-16  388  				__func__, pclk_name);
5c881d9ae94801 arch/arm/mach-spear6xx/spear6xx.c Shiraz Hashim     2011-02-16  389  		BUG();
5c881d9ae94801 arch/arm/mach-spear6xx/spear6xx.c Shiraz Hashim     2011-02-16  390  	}
5c881d9ae94801 arch/arm/mach-spear6xx/spear6xx.c Shiraz Hashim     2011-02-16  391  
5c881d9ae94801 arch/arm/mach-spear6xx/spear6xx.c Shiraz Hashim     2011-02-16  392  	clk_set_parent(gpt_clk, pclk);
5c881d9ae94801 arch/arm/mach-spear6xx/spear6xx.c Shiraz Hashim     2011-02-16  393  	clk_put(gpt_clk);
5c881d9ae94801 arch/arm/mach-spear6xx/spear6xx.c Shiraz Hashim     2011-02-16  394  	clk_put(pclk);
5c881d9ae94801 arch/arm/mach-spear6xx/spear6xx.c Shiraz Hashim     2011-02-16  395  
30551c0108e0d2 arch/arm/mach-spear6xx/spear6xx.c Viresh Kumar      2012-04-21  396  	spear_setup_of_timer();
5c881d9ae94801 arch/arm/mach-spear6xx/spear6xx.c Shiraz Hashim     2011-02-16  397  }
5c881d9ae94801 arch/arm/mach-spear6xx/spear6xx.c Shiraz Hashim     2011-02-16  398  

:::::: The code at line 365 was first introduced by commit
:::::: 8f590d4541fb678a638777ab987709217cb71365 ARM: 6015/1: ST SPEAr: Added source files for SPEAr6xx machine family

:::::: TO: viresh kumar <viresh.kumar@...com>
:::::: CC: Russell King <rmk+kernel@....linux.org.uk>

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

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