linux-kernel - [arm-integrator:kernel-in-vmalloc-v5.17-rc1 4/8] arch/arm/mm/init.c:307:13: warning: no previous prototype for function 'mem_init_print_arm

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Message-ID: <202203112052.m5tYcVx1-lkp@intel.com>
Date:   Fri, 11 Mar 2022 20:51:02 +0800
From:   kernel test robot <lkp@...el.com>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org
Subject: [arm-integrator:kernel-in-vmalloc-v5.17-rc1 4/8]
 arch/arm/mm/init.c:307:13: warning: no previous prototype for function
 'mem_init_print_arm_info'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-integrator.git kernel-in-vmalloc-v5.17-rc1
head:   66e9038ef48dc66c07b12443b73e2d1f3f12cbab
commit: 18e0d99ee35450767fc8222f1727febdd2a4deac [4/8] ARM: Print virtual memory info again
config: arm-vt8500_v6_v7_defconfig (https://download.01.org/0day-ci/archive/20220311/202203112052.m5tYcVx1-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 276ca87382b8f16a65bddac700202924228982f6)
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/linusw/linux-integrator.git/commit/?id=18e0d99ee35450767fc8222f1727febdd2a4deac
        git remote add arm-integrator https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-integrator.git
        git fetch --no-tags arm-integrator kernel-in-vmalloc-v5.17-rc1
        git checkout 18e0d99ee35450767fc8222f1727febdd2a4deac
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash arch/arm/mm/

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

All warnings (new ones prefixed by >>):

   arch/arm/mm/init.c:97:13: warning: no previous prototype for function 'setup_dma_zone' [-Wmissing-prototypes]
   void __init setup_dma_zone(const struct machine_desc *mdesc)
               ^
   arch/arm/mm/init.c:97:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void __init setup_dma_zone(const struct machine_desc *mdesc)
   ^
   static 
>> arch/arm/mm/init.c:307:13: warning: no previous prototype for function 'mem_init_print_arm_info' [-Wmissing-prototypes]
   void __init mem_init_print_arm_info(void)
               ^
   arch/arm/mm/init.c:307:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void __init mem_init_print_arm_info(void)
   ^
   static 
   2 warnings generated.


vim +/mem_init_print_arm_info +307 arch/arm/mm/init.c

   306	
 > 307	void __init mem_init_print_arm_info(void)
   308	{
   309	#define MLM(b, t) b, t, ((t) - (b)) >> 20
   310		pr_notice("Virtual kernel memory layout:\n"
   311			  "    fixmap  : 0x%08lx - 0x%08lx   (%4ld MB)\n"
   312			  "    vmalloc : 0x%08lx - 0x%08lx   (%4ld MB)\n"
   313			  "    lowmem  : 0x%08lx - 0x%08lx   (%4ld MB)\n"
   314	#ifdef CONFIG_MODULES
   315			  "    modules : 0x%08lx - 0x%08lx   (%4ld MB)\n",
   316	#endif
   317			  "     kernel : 0x%08lx - 0x%08lx   (%4ld MB)\n",
   318			  MLM(FIXADDR_START, FIXADDR_END),
   319			  MLM(VMALLOC_START, VMALLOC_END),
   320			  MLM(PAGE_OFFSET, (unsigned long)high_memory),
   321	#ifdef CONFIG_MODULES
   322			  MLM(MODULES_VADDR, MODULES_END),
   323	#endif
   324			  /* From beginning of .text to end of .bss */
   325			  MLM((unsigned long)_text, (unsigned long)__bss_stop));
   326	#undef MLM
   327	}
   328	

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