linux-kernel - arch/arm/mach-versatile/versatile.c:56:14: warning: no previous prototype for function 'mmc

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Message-ID: <202305271705.tpnbJxpk-lkp@intel.com>
Date:   Sat, 27 May 2023 17:21:09 +0800
From:   kernel test robot <lkp@...el.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: arch/arm/mach-versatile/versatile.c:56:14: warning: no previous
 prototype for function 'mmc_status'

Hi Arnd,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   49572d5361298711207ab387a6c318407deb963a
commit: d7445676e86900f8dc363825033ff62416c216e0 ARM: versatile: move integrator/realview/vexpress to versatile
date:   1 year, 2 months ago
config: arm-multi_v5_defconfig (https://download.01.org/0day-ci/archive/20230527/202305271705.tpnbJxpk-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 4faf3aaf28226a4e950c103a14f6fc1d1fdabb1b)
reproduce (this is a W=1 build):
        mkdir -p ~/bin
        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=d7445676e86900f8dc363825033ff62416c216e0
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout d7445676e86900f8dc363825033ff62416c216e0
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=arm olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202305271705.tpnbJxpk-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> arch/arm/mach-versatile/versatile.c:56:14: warning: no previous prototype for function 'mmc_status' [-Wmissing-prototypes]
   unsigned int mmc_status(struct device *dev)
                ^
   arch/arm/mach-versatile/versatile.c:56:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   unsigned int mmc_status(struct device *dev)
   ^
   static 
   1 warning generated.


vim +/mmc_status +56 arch/arm/mach-versatile/versatile.c

a7096789211193 arch/arm/mach-versatile/versatile_dt.c Rob Herring 2015-12-08  55  
a7096789211193 arch/arm/mach-versatile/versatile_dt.c Rob Herring 2015-12-08 @56  unsigned int mmc_status(struct device *dev)
a7096789211193 arch/arm/mach-versatile/versatile_dt.c Rob Herring 2015-12-08  57  {
a7096789211193 arch/arm/mach-versatile/versatile_dt.c Rob Herring 2015-12-08  58  	struct amba_device *adev = container_of(dev, struct amba_device, dev);
a7096789211193 arch/arm/mach-versatile/versatile_dt.c Rob Herring 2015-12-08  59  	u32 mask;
a7096789211193 arch/arm/mach-versatile/versatile_dt.c Rob Herring 2015-12-08  60  
a7096789211193 arch/arm/mach-versatile/versatile_dt.c Rob Herring 2015-12-08  61  	if (adev->res.start == VERSATILE_MMCI0_BASE)
a7096789211193 arch/arm/mach-versatile/versatile_dt.c Rob Herring 2015-12-08  62  		mask = 1;
a7096789211193 arch/arm/mach-versatile/versatile_dt.c Rob Herring 2015-12-08  63  	else
a7096789211193 arch/arm/mach-versatile/versatile_dt.c Rob Herring 2015-12-08  64  		mask = 2;
a7096789211193 arch/arm/mach-versatile/versatile_dt.c Rob Herring 2015-12-08  65  
a7096789211193 arch/arm/mach-versatile/versatile_dt.c Rob Herring 2015-12-08  66  	return readl(versatile_sys_base + VERSATILE_SYS_MCI_OFFSET) & mask;
a7096789211193 arch/arm/mach-versatile/versatile_dt.c Rob Herring 2015-12-08  67  }
a7096789211193 arch/arm/mach-versatile/versatile_dt.c Rob Herring 2015-12-08  68  

:::::: The code at line 56 was first introduced by commit
:::::: a70967892111934e292485ce84f1bab38cc55380 ARM: versatile: merge mach code into a single file

:::::: TO: Rob Herring <robh@...nel.org>
:::::: CC: Arnd Bergmann <arnd@...db.de>

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