Re: [PATCH RFC v4 19/42] kmsan: x86/asm: softirq: add KMSAN IRQ entry hooks

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

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Hi,

[FYI, it's a private test report for your RFC patch.]
[auto build test ERROR on linus/master]
[also build test ERROR on v5.5-rc3]
[cannot apply to tip/x86/core tip/x86/mm efi/next next-20191220]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/glider-google-com/Add-KernelMemorySanitizer-infrastructure/20191224-024330
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 46cf053efec6a3a5f343fead837777efe8252a46
config: i386-tinyconfig (attached as .config)
compiler: gcc-7 (Debian 7.5.0-3) 7.5.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

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

All errors (new ones prefixed by >>):

   kernel/softirq.c: In function 'run_ksoftirqd':
>> kernel/softirq.c:606:3: error: implicit declaration of function 'kmsan_context_enter'; did you mean 'kmsan_softirq_enter'? [-Werror=implicit-function-declaration]
      kmsan_context_enter();
      ^~~~~~~~~~~~~~~~~~~
      kmsan_softirq_enter
>> kernel/softirq.c:608:3: error: implicit declaration of function 'kmsan_context_exit'; did you mean 'kmsan_softirq_exit'? [-Werror=implicit-function-declaration]
      kmsan_context_exit();
      ^~~~~~~~~~~~~~~~~~
      kmsan_softirq_exit
   cc1: some warnings being treated as errors

vim +606 kernel/softirq.c

   597	
   598	static void run_ksoftirqd(unsigned int cpu)
   599	{
   600		local_irq_disable();
   601		if (local_softirq_pending()) {
   602			/*
   603			 * We can safely run softirq on inline stack, as we are not deep
   604			 * in the task stack here.
   605			 */
 > 606			kmsan_context_enter();
   607			__do_softirq();
 > 608			kmsan_context_exit();
   609			local_irq_enable();
   610			cond_resched();
   611			return;
   612		}
   613		local_irq_enable();
   614	}
   615	

---
0-DAY kernel test infrastructure                 Open Source Technology Center
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org Intel Corporation

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