[tglx-devel:timers/cleanup 3/59] arch/arm/include/asm/smp.h:73:43: warning: 'struct completion' declared inside parameter list will not be visible outside of this definition or declaration

[tglx-devel:timers/cleanup 3/59] arch/arm/include/asm/smp.h:73:43: warning: 'struct completion' declared inside parameter list will not be visible outside of this definition or declaration

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git timers/cleanup
head:   0ad363c8e014568032d53fe2c7ab288de68373f4
commit: 7685fb5c8fe1aebd1a2202b2267a79d5b6775fd2 [3/59] nodemask: Include find.h instead of random.h
config: arm-randconfig-002-20260713 (https://download.01.org/0day-ci/archive/20260713/202607130847.Qldf3HQK-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 15.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260713/202607130847.Qldf3HQK-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202607130847.Qldf3HQK-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from include/linux/smp.h:120,
                    from include/linux/alloc_tag.h:14,
                    from include/linux/percpu.h:5,
                    from include/linux/prandom.h:13,
                    from kernel/sched/sched.h:8,
                    from kernel/sched/rq-offsets.c:5:
>> arch/arm/include/asm/smp.h:73:43: warning: 'struct completion' declared inside parameter list will not be visible outside of this definition or declaration
      73 | extern int register_ipi_completion(struct completion *completion, int cpu);
         |                                           ^~~~~~~~~~
--
   In file included from include/linux/smp.h:120,
                    from include/linux/lockdep.h:14,
                    from include/linux/spinlock.h:63,
                    from include/linux/mmzone.h:8,
                    from include/linux/gfp.h:7,
                    from include/linux/umh.h:4,
                    from include/linux/kmod.h:9,
                    from include/linux/module.h:18,
                    from arch/arm/kernel/smp.c:7:
>> arch/arm/include/asm/smp.h:73:43: warning: 'struct completion' declared inside parameter list will not be visible outside of this definition or declaration
      73 | extern int register_ipi_completion(struct completion *completion, int cpu);
         |                                           ^~~~~~~~~~
   arch/arm/kernel/smp.c:619:5: error: conflicting types for 'register_ipi_completion'; have 'int(struct completion *, int)'
     619 | int register_ipi_completion(struct completion *completion, int cpu)
         |     ^~~~~~~~~~~~~~~~~~~~~~~
   arch/arm/include/asm/smp.h:73:12: note: previous declaration of 'register_ipi_completion' with type 'int(struct completion *, int)'
      73 | extern int register_ipi_completion(struct completion *completion, int cpu);
         |            ^~~~~~~~~~~~~~~~~~~~~~~
--
   In file included from include/linux/smp.h:120,
                    from include/linux/alloc_tag.h:14,
                    from include/linux/percpu.h:5,
                    from include/linux/prandom.h:13,
                    from kernel/sched/sched.h:8,
                    from kernel/sched/rq-offsets.c:5:
>> arch/arm/include/asm/smp.h:73:43: warning: 'struct completion' declared inside parameter list will not be visible outside of this definition or declaration
      73 | extern int register_ipi_completion(struct completion *completion, int cpu);
         |                                           ^~~~~~~~~~


vim +73 arch/arm/include/asm/smp.h

f6dd9fa5a75a3d include/asm-arm/smp.h      Jens Axboe    2008-06-10  72  
5135d875e1457e arch/arm/include/asm/smp.h Nicolas Pitre 2012-11-27 @73  extern int register_ipi_completion(struct completion *completion, int cpu);
5135d875e1457e arch/arm/include/asm/smp.h Nicolas Pitre 2012-11-27  74  

:::::: The code at line 73 was first introduced by commit
:::::: 5135d875e1457ef946a055003d8f80713e862135 ARM: SMP: basic IPI triggered completion support

:::::: TO: Nicolas Pitre <nicolas.pitre@linaro.org>
:::::: CC: Nicolas Pitre <nicolas.pitre@linaro.org>

--
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https://github.com/intel/lkp-tests/wiki