linux-kernel - drivers/irqchip/irq-ftintc010.c:165:12: warning: no previous prototype for function 'ft010_of_init

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Date:   Sun, 19 Mar 2023 13:42:52 +0800
From:   kernel test robot <lkp@...el.com>
To:     Nathan Chancellor <nathan@...nel.org>
Cc:     llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
        linux-kernel@...r.kernel.org,
        "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
Subject: drivers/irqchip/irq-ftintc010.c:165:12: warning: no previous
 prototype for function 'ft010_of_init_irq'

Hi Nathan,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   a3671bd86a9770e34969522d29bb30a1b66fd88a
commit: 5eb6e280432ddc9b755193552f3a070da8d7455c ARM: 9289/1: Allow pre-ARMv5 builds with ld.lld 16.0.0 and newer
date:   7 weeks ago
config: arm-moxart_defconfig (https://download.01.org/0day-ci/archive/20230319/202303191313.6WHJJhVD-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 67409911353323ca5edf2049ef0df54132fa1ca7)
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=5eb6e280432ddc9b755193552f3a070da8d7455c
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 5eb6e280432ddc9b755193552f3a070da8d7455c
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash drivers/irqchip/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202303191313.6WHJJhVD-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/irqchip/irq-ftintc010.c:128:39: warning: no previous prototype for function 'ft010_irqchip_handle_irq' [-Wmissing-prototypes]
   asmlinkage void __exception_irq_entry ft010_irqchip_handle_irq(struct pt_regs *regs)
                                         ^
   drivers/irqchip/irq-ftintc010.c:128:12: note: declare 'static' if the function is not intended to be used outside of this translation unit
   asmlinkage void __exception_irq_entry ft010_irqchip_handle_irq(struct pt_regs *regs)
              ^
              static 
>> drivers/irqchip/irq-ftintc010.c:165:12: warning: no previous prototype for function 'ft010_of_init_irq' [-Wmissing-prototypes]
   int __init ft010_of_init_irq(struct device_node *node,
              ^
   drivers/irqchip/irq-ftintc010.c:165:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int __init ft010_of_init_irq(struct device_node *node,
   ^
   static 
   2 warnings generated.


vim +/ft010_of_init_irq +165 drivers/irqchip/irq-ftintc010.c

6ee532e2faa997 Linus Walleij 2017-03-18  164  
6ee532e2faa997 Linus Walleij 2017-03-18 @165  int __init ft010_of_init_irq(struct device_node *node,

:::::: The code at line 165 was first introduced by commit
:::::: 6ee532e2faa9979f0ee00afbfd39cbc034b99153 irqchip/gemini: Refactor Gemini driver to reflect Faraday origin

:::::: TO: Linus Walleij <linus.walleij@...aro.org>
:::::: CC: Marc Zyngier <marc.zyngier@....com>

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests