linux-kernel - Re: [PATCH v2 11/11] smp: modify up.c to adopt the same format of cross CPU call.

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Date:   Sat, 23 Apr 2022 13:17:52 +0800
From:   kernel test robot <lkp@...el.com>
To:     Donghai Qiao <dqiao@...hat.com>, akpm@...ux-foundation.org,
        sfr@...b.auug.org.au, arnd@...db.de, peterz@...radead.org,
        heying24@...wei.com, andriy.shevchenko@...ux.intel.com,
        axboe@...nel.dk, rdunlap@...radead.org, tglx@...utronix.de,
        gor@...ux.ibm.com
Cc:     kbuild-all@...ts.01.org, donghai.w.qiao@...il.com,
        linux-kernel@...r.kernel.org, Donghai Qiao <dqiao@...hat.com>
Subject: Re: [PATCH v2 11/11] smp: modify up.c to adopt the same format of
 cross CPU call.

Hi Donghai,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on powerpc/next]
[also build test ERROR on rafael-pm/linux-next linus/master v5.18-rc3]
[cannot apply to tip/x86/core next-20220422]
[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/Donghai-Qiao/smp-cross-CPU-call-interface/20220423-060436
base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
config: x86_64-randconfig-a013 (https://download.01.org/0day-ci/archive/20220423/202204231333.D1x82f1d-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.2.0-20) 11.2.0
reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/655b898028ef1555f6bec036db8d4681b551aaa8
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Donghai-Qiao/smp-cross-CPU-call-interface/20220423-060436
        git checkout 655b898028ef1555f6bec036db8d4681b551aaa8
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash

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

All errors (new ones prefixed by >>):

   kernel/up.c: In function 'smp_call_mask':
>> kernel/up.c:50:18: error: 'cpu' undeclared (first use in this function); did you mean 'fpu'?
      50 |         smp_call(cpu, func, info, type);
         |                  ^~~
         |                  fpu
   kernel/up.c:50:18: note: each undeclared identifier is reported only once for each function it appears in
   kernel/up.c:44:23: warning: unused variable 'flags' [-Wunused-variable]
      44 |         unsigned long flags;
         |                       ^~~~~
   kernel/up.c: In function 'smp_call_mask_cond':
   kernel/up.c:80:26: error: 'cpu' undeclared (first use in this function); did you mean 'fpu'?
      80 |                 smp_call(cpu, func, info, type);
         |                          ^~~
         |                          fpu
   kernel/up.c:76:23: warning: unused variable 'flags' [-Wunused-variable]
      76 |         unsigned long flags;
         |                       ^~~~~
   In file included from include/linux/percpu.h:7,
                    from include/linux/context_tracking_state.h:5,
                    from include/linux/hardirq.h:5,
                    from include/linux/interrupt.h:11,
                    from kernel/up.c:6:
   At top level:
   include/linux/smp.h:131:14: warning: 'seq_type' defined but not used [-Wunused-variable]
     131 | static char *seq_type[] = {
         |              ^~~~~~~~


vim +50 kernel/up.c

    41	
    42	void smp_call_mask(const struct cpumask *mask, smp_call_func_t func, void *info, unsigned int type)
    43	{
    44		unsigned long flags;
    45	
    46		if (!cpumask_test_cpu(0, mask))
    47			return;
    48	
    49		preempt_disable();
  > 50		smp_call(cpu, func, info, type);
    51		preempt_enable();
    52	}
    53	EXPORT_SYMBOL(smp_call_mask);
    54	

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