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

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Message-ID: <202210141441.mghTUVSX-lkp@intel.com>
Date:   Fri, 14 Oct 2022 14:47:03 +0800
From:   kernel test robot <lkp@...el.com>
To:     Ard Biesheuvel <ardb@...nel.org>
Cc:     llvm@...ts.linux.dev, 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 function 'stext_offset'

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git efi-zboot-direct
head:   bf1830a27c8d6916637f2df1d9ff68812fb25cf9
commit: 557c44b5d9599f7277f8431d64bfbfffea763b43 [31/35] efi/riscv: libstub: Split off kernel image relocation for builtin stub
config: riscv-randconfig-r036-20221012
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 791a7ae1ba3efd6bca96338e10ffde557ba83920)
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 riscv cross compiling tool for clang build
        # apt-get install binutils-riscv-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git/commit/?id=557c44b5d9599f7277f8431d64bfbfffea763b43
        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 557c44b5d9599f7277f8431d64bfbfffea763b43
        # 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=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 function 'stext_offset' [-Wmissing-prototypes]
   unsigned long stext_offset(void)
                 ^
   drivers/firmware/efi/libstub/riscv-stub.c:14:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   unsigned long stext_offset(void)
   ^
   static 
   1 warning generated.
--
>> drivers/firmware/efi/libstub/riscv.c:75:22: warning: no previous prototype for function 'stext_offset' [-Wmissing-prototypes]
   unsigned long __weak stext_offset(void)
                        ^
   drivers/firmware/efi/libstub/riscv.c:75:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   unsigned long __weak stext_offset(void)
   ^
   static 
   1 warning generated.


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" (181299 bytes)