linux-kernel - arch/arm/mach-iop32x/cp6.c:10:6: warning: no previous prototype for 'iop_enable

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Message-ID: <202204042312.fVSuandr-lkp@intel.com>
Date:   Mon, 4 Apr 2022 23:27:14 +0800
From:   kernel test robot <lkp@...el.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Ard Biesheuvel <ardb@...nel.org>
Subject: arch/arm/mach-iop32x/cp6.c:10:6: warning: no previous prototype for
 'iop_enable_cp6'

Hi Arnd,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   3123109284176b1532874591f7c81f3837bbdc17
commit: 6f5d248d05db9c4991366154f1a657a630faa583 ARM: iop32x: use GENERIC_IRQ_MULTI_HANDLER
date:   4 months ago
config: arm-randconfig-r002-20220404 (https://download.01.org/0day-ci/archive/20220404/202204042312.fVSuandr-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 11.2.0
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
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6f5d248d05db9c4991366154f1a657a630faa583
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 6f5d248d05db9c4991366154f1a657a630faa583
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arm SHELL=/bin/bash

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/mach-iop32x/cp6.c:10:6: warning: no previous prototype for 'iop_enable_cp6' [-Wmissing-prototypes]
      10 | void iop_enable_cp6(void)
         |      ^~~~~~~~~~~~~~
   arch/arm/mach-iop32x/cp6.c:43:13: warning: no previous prototype for 'iop_init_cp6_handler' [-Wmissing-prototypes]
      43 | void __init iop_init_cp6_handler(void)
         |             ^~~~~~~~~~~~~~~~~~~~


vim +/iop_enable_cp6 +10 arch/arm/mach-iop32x/cp6.c

     9	
  > 10	void iop_enable_cp6(void)
    11	{
    12		u32 temp;
    13	
    14	        /* enable cp6 access */
    15	        asm volatile (
    16			"mrc	p15, 0, %0, c15, c1, 0\n\t"
    17			"orr	%0, %0, #(1 << 6)\n\t"
    18			"mcr	p15, 0, %0, c15, c1, 0\n\t"
    19			"mrc	p15, 0, %0, c15, c1, 0\n\t"
    20			"mov	%0, %0\n\t"
    21			"sub	pc, pc, #4  @ cp_wait\n\t"
    22			: "=r"(temp));
    23	}
    24	

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