arch/arm64/kvm/hyp/nvhe/stacktrace.c:46:6: warning: no previous prototype for function 'kvm_nvhe_prepare_backtrace'

From: kernel test robot
Date: Thu Feb 09 2023 - 01:59:36 EST


Hi Kalesh,

FYI, the error/warning still remains.

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 0983f6bf2bfc0789b51ddf7315f644ff4da50acb
commit: 879e5ac7b2e4db05799a905b5a07fc9e5dedf651 KVM: arm64: Prepare non-protected nVHE hypervisor stacktrace
date: 7 months ago
config: arm64-randconfig-r022-20230209 (https://download.01.org/0day-ci/archive/20230209/202302091437.1vnXBd7s-lkp@xxxxxxxxx/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project db0e6591612b53910a1b366863348bdb9d7d2fb1)
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 arm64 cross compiling tool for clang build
# apt-get install binutils-aarch64-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=879e5ac7b2e4db05799a905b5a07fc9e5dedf651
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 879e5ac7b2e4db05799a905b5a07fc9e5dedf651
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash arch/arm64/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Link: https://lore.kernel.org/oe-kbuild-all/202302091437.1vnXBd7s-lkp@xxxxxxxxx

All warnings (new ones prefixed by >>):

>> arch/arm64/kvm/hyp/nvhe/stacktrace.c:46:6: warning: no previous prototype for function 'kvm_nvhe_prepare_backtrace' [-Wmissing-prototypes]
void kvm_nvhe_prepare_backtrace(unsigned long fp, unsigned long pc)
^
arch/arm64/kvm/hyp/nvhe/stacktrace.c:46:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void kvm_nvhe_prepare_backtrace(unsigned long fp, unsigned long pc)
^
static
1 warning generated.


vim +/kvm_nvhe_prepare_backtrace +46 arch/arm64/kvm/hyp/nvhe/stacktrace.c

36
37 /*
38 * kvm_nvhe_prepare_backtrace - prepare to dump the nVHE backtrace
39 *
40 * @fp : frame pointer at which to start the unwinding.
41 * @pc : program counter at which to start the unwinding.
42 *
43 * Saves the information needed by the host to dump the nVHE hypervisor
44 * backtrace.
45 */
> 46 void kvm_nvhe_prepare_backtrace(unsigned long fp, unsigned long pc)

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