Re: [PATCH v10 08/16] riscv: Add task switch support for vector

[kernel test robot <lkp@intel.com>]

Hi Greentime,

I love your patch! Perhaps something to improve:

[auto build test WARNING on linux/master]
[also build test WARNING on linus/master v5.18-rc6]
[cannot apply to kees/for-next/execve next-20220511]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/intel-lab-lkp/linux/commits/Greentime-Hu/riscv-Add-vector-ISA-support/20220511-163610
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git feb9c5e19e913b53cb536a7aa7c9f20107bb51ec
config: riscv-randconfig-r031-20220509 (https://download.01.org/0day-ci/archive/20220512/202205120146.F7wGCoud-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 18dd123c56754edf62c7042dcf23185c3727610f)
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://github.com/intel-lab-lkp/linux/commit/dcb5b4bc0fc33bba0eb3219b9a8d29ddff58bbef
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Greentime-Hu/riscv-Add-vector-ISA-support/20220511-163610
        git checkout dcb5b4bc0fc33bba0eb3219b9a8d29ddff58bbef
        # 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 arch/riscv/kernel/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> arch/riscv/kernel/process.c:149:6: warning: no previous prototype for function 'arch_release_task_struct' [-Wmissing-prototypes]
   void arch_release_task_struct(struct task_struct *tsk)
        ^
   arch/riscv/kernel/process.c:149:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void arch_release_task_struct(struct task_struct *tsk)
   ^
   static 
   1 warning generated.


vim +/arch_release_task_struct +149 arch/riscv/kernel/process.c

   148	
 > 149	void arch_release_task_struct(struct task_struct *tsk)
   150	{
   151		/* Free the vector context of datap. */
   152		if (has_vector() && tsk->thread.vstate.datap)
   153			kfree(tsk->thread.vstate.datap);
   154	}
   155	

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