linux-kernel - [ardb:efi-zboot-direct 31/35] drivers/firmware/efi/libstub/riscv-stub.c:14:15: warning: no previous prototype for 'stext

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Date:   Thu, 13 Oct 2022 22:09:22 +0800
From:   kernel test robot <lkp@...el.com>
To:     Ard Biesheuvel <ardb@...nel.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [ardb:efi-zboot-direct 31/35]
 drivers/firmware/efi/libstub/riscv-stub.c:14:15: warning: no previous
 prototype for 'stext_offset'

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git efi-zboot-direct
head:   c4954c4853a50dbfefd1beb56d466ab612164ae2
commit: ac80575cb5f533845586357fd272898e4fdaf44a [31/35] efi/riscv: libstub: Split off kernel image relocation for builtin stub
config: riscv-allmodconfig
compiler: riscv64-linux-gcc (GCC) 12.1.0
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/ardb/linux.git/commit/?id=ac80575cb5f533845586357fd272898e4fdaf44a
        git remote add ardb git://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git
        git fetch --no-tags ardb efi-zboot-direct
        git checkout ac80575cb5f533845586357fd272898e4fdaf44a
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash drivers/firmware/efi/libstub/

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 >>):

>> drivers/firmware/efi/libstub/riscv-stub.c:14:15: warning: no previous prototype for 'stext_offset' [-Wmissing-prototypes]
      14 | unsigned long stext_offset(void)
         |               ^~~~~~~~~~~~
--
>> drivers/firmware/efi/libstub/riscv.c:75:22: warning: no previous prototype for 'stext_offset' [-Wmissing-prototypes]
      75 | unsigned long __weak stext_offset(void)
         |                      ^~~~~~~~~~~~


vim +/stext_offset +14 drivers/firmware/efi/libstub/riscv-stub.c

    13	
  > 14	unsigned long stext_offset(void)
    15	{
    16		/*
    17		 * When built as part of the kernel, the EFI stub cannot branch to the
    18		 * kernel proper via the image header, as the PE/COFF header is
    19		 * strictly not part of the in-memory presentation of the image, only
    20		 * of the file representation. So instead, we need to jump to the
    21		 * actual entrypoint in the .text region of the image.
    22		 */
    23		return _start_kernel - _start;
    24	}
    25	

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

View attachment "config" of type "text/plain" (319611 bytes)