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SubjectRe: drivers/clocksource/timer-riscv.c:28:16: error: implicit declaration of function 'get_cycles64'
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On 11/21/20 6:26 AM, kernel test robot wrote:
> Hi Palmer,
>
> FYI, the error/warning still remains.
>
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head: 27bba9c532a8d21050b94224ffd310ad0058c353
> commit: d5be89a8d118a8e8d09cd74a921a808f17fbdd09 RISC-V: Resurrect the MMIO timer implementation for M-mode systems
> date: 9 weeks ago
> config: riscv-randconfig-r034-20201121 (attached as .config)
> compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project bec968cbb367dd03439c89c1d4ef968ef662d7c0)
> 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-riscv64-linux-gnu
> # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d5be89a8d118a8e8d09cd74a921a808f17fbdd09
> git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
> git fetch --no-tags linus master
> git checkout d5be89a8d118a8e8d09cd74a921a808f17fbdd09
> # save the attached .config to linux build tree
> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@intel.com>
>
> All errors (new ones prefixed by >>):

CONFIG_RISCV_M_MODE=y

and that prevents get_cycles64() in
arch/riscv/include/asm/timex.h from being visible.

I suppose that was intended?


>>> drivers/clocksource/timer-riscv.c:28:16: error: implicit declaration of function 'get_cycles64' [-Werror,-Wimplicit-function-declaration]
> sbi_set_timer(get_cycles64() + delta);
> ^
> drivers/clocksource/timer-riscv.c:28:16: note: did you mean 'get_cycles'?
> arch/riscv/include/asm/timex.h:18:24: note: 'get_cycles' declared here
> static inline cycles_t get_cycles(void)
> ^
> drivers/clocksource/timer-riscv.c:47:9: error: implicit declaration of function 'get_cycles64' [-Werror,-Wimplicit-function-declaration]
> return get_cycles64();
> ^
> drivers/clocksource/timer-riscv.c:52:9: error: implicit declaration of function 'get_cycles64' [-Werror,-Wimplicit-function-declaration]
> return get_cycles64();
> ^
> 7 warnings and 3 errors generated.
>
> vim +/get_cycles64 +28 drivers/clocksource/timer-riscv.c
>


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