[PATCH 1/2] riscv: Support irq_work via self IPIs

[kernel test robot]

Hi Greentime,

I love your patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v5.8-rc2 next-20200623]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use  as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Greentime-Hu/riscv-Add-context-tracker-support/20200623-213029
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git dd0d718152e4c65b173070d48ea9dfc06894c3e5
config: riscv-allyesconfig (attached as .config)
compiler: riscv64-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
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=riscv 

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

All warnings (new ones prefixed by >>):

>> arch/riscv/kernel/smp.c:129:6: warning: no previous prototype for 'arch_irq_work_raise' [-Wmissing-prototypes]
     129 | void arch_irq_work_raise(void)
         |      ^~~~~~~~~~~~~~~~~~~

vim +/arch_irq_work_raise +129 arch/riscv/kernel/smp.c

   127	
   128	#ifdef CONFIG_IRQ_WORK
 > 129	void arch_irq_work_raise(void)
   130	{
   131		send_ipi_single(smp_processor_id(), IPI_IRQ_WORK);
   132	}
   133	#endif
   134	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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