On Mon, Dec 14, 2020 at 10:28:48AM +0000, Catalin Marinas wrote:
On Mon, Dec 14, 2020 at 03:12:34PM +0800, kernel test robot wrote:
> tree:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head: 2c85ebc57b3e1817b6ce1a6b703928e113a90442
> commit: ed3768db588291ddb5dc794daed12cc751373566 arm64: entry: convert el1_sync to
C
> date: 1 year, 2 months ago
> config: arm64-randconfig-r021-20201214 (attached as .config)
> compiler: aarch64-linux-gcc (GCC) 9.3.0
> 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...
> git remote add linus
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
> git fetch --no-tags linus master
> git checkout ed3768db588291ddb5dc794daed12cc751373566
> # save the attached .config to linux build tree
> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm64
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp(a)intel.com>
>
> All warnings (new ones prefixed by >>):
>
> >> arch/arm64/kernel/entry-common.c:68:25: warning: no previous prototype for
'el1_sync_handler' [-Wmissing-prototypes]
> 68 | asmlinkage void notrace el1_sync_handler(struct pt_regs *regs)
Do we actually need to fix these? It's asmlinkage and called from
assembly, it wouldn't understand a prototype anyway.
Given we do this for a few other asmlinkage functions in this area, I'll
spin a patch to add the few missing entry-common.c prototypes to
asm/exception.h for consistency.
It's not strictly necessary, but it's vastly less effort than fighting
the testing systems. ;)
Thanks,
Mark.