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Date:   Sat, 11 Nov 2023 18:22:52 +0800
From:   kernel test robot <lkp@...el.com>
To:     Petr Štetiar <ynezz@...e.cz>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Paul Burton <paul.burton@...s.com>
Subject: drivers/irqchip/irq-ath79-misc.c:29:5: warning: no previous
 prototype for 'get_c0_perfcount_int'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   3ca112b71f35dd5d99fc4571a56b5fc6f0c15814
commit: a1e8783db8e0d58891681bc1e6d9ada66eae8e20 MIPS: perf: ath79: Fix perfcount IRQ assignment
date:   4 years, 7 months ago
config: mips-randconfig-r005-20210928 (https://download.01.org/0day-ci/archive/20231111/202311111847.SpxiCHnp-lkp@intel.com/config)
compiler: mips-linux-gcc (GCC) 12.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231111/202311111847.SpxiCHnp-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202311111847.SpxiCHnp-lkp@intel.com/

All warnings (new ones prefixed by >>):

   include/linux/device.h:686:13: note: in expansion of macro 'unlikely'
     686 |         if (unlikely(check_mul_overflow(n, size, &bytes)))
         |             ^~~~~~~~
   include/linux/compiler.h:64:25: note: previous declaration here
      64 |                         ______f = {                                     \
         |                         ^~~~~~~
   include/linux/compiler.h:56:23: note: in expansion of macro '__trace_if'
      56 | #define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) )
         |                       ^~~~~~~~~~
   include/linux/device.h:686:9: note: in expansion of macro 'if'
     686 |         if (unlikely(check_mul_overflow(n, size, &bytes)))
         |         ^~
   include/linux/device.h: In function 'device_lock_assert':
   include/linux/compiler.h:25:39: warning: ignoring attribute 'section ("\"_ftrace_annotated_branch\"")' because it conflicts with previous 'section ("\"_ftrace_branch\"")' [-Wattributes]
      25 |                         static struct ftrace_likely_data                \
         |                                       ^~~~~~~~~~~~~~~~~~
   include/linux/compiler.h:69:30: note: in definition of macro '__trace_if'
      69 |                 ______r = !!(cond);                                     \
         |                              ^~~~
   include/asm-generic/bug.h:123:9: note: in expansion of macro 'if'
     123 |         if (unlikely(__ret_warn_on))                                    \
         |         ^~
   include/linux/compiler.h:48:26: note: in expansion of macro '__branch_check__'
      48 | #  define unlikely(x)   (__branch_check__(x, 0, __builtin_constant_p(x)))
         |                          ^~~~~~~~~~~~~~~~
   include/asm-generic/bug.h:123:13: note: in expansion of macro 'unlikely'
     123 |         if (unlikely(__ret_warn_on))                                    \
         |             ^~~~~~~~
   include/linux/lockdep.h:380:17: note: in expansion of macro 'WARN_ON'
     380 |                 WARN_ON(debug_locks && !lockdep_is_held(l));    \
         |                 ^~~~~~~
   include/linux/device.h:1227:9: note: in expansion of macro 'lockdep_assert_held'
    1227 |         lockdep_assert_held(&dev->mutex);
         |         ^~~~~~~~~~~~~~~~~~~
   include/linux/compiler.h:64:25: note: previous declaration here
      64 |                         ______f = {                                     \
         |                         ^~~~~~~
   include/linux/compiler.h:56:23: note: in expansion of macro '__trace_if'
      56 | #define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) )
         |                       ^~~~~~~~~~
   include/asm-generic/bug.h:123:9: note: in expansion of macro 'if'
     123 |         if (unlikely(__ret_warn_on))                                    \
         |         ^~
   include/linux/lockdep.h:380:17: note: in expansion of macro 'WARN_ON'
     380 |                 WARN_ON(debug_locks && !lockdep_is_held(l));    \
         |                 ^~~~~~~
   include/linux/device.h:1227:9: note: in expansion of macro 'lockdep_assert_held'
    1227 |         lockdep_assert_held(&dev->mutex);
         |         ^~~~~~~~~~~~~~~~~~~
   arch/mips/include/asm/ptrace.h: In function 'regs_get_register':
   include/linux/compiler.h:25:39: warning: ignoring attribute 'section ("\"_ftrace_annotated_branch\"")' because it conflicts with previous 'section ("\"_ftrace_branch\"")' [-Wattributes]
      25 |                         static struct ftrace_likely_data                \
         |                                       ^~~~~~~~~~~~~~~~~~
   include/linux/compiler.h:69:30: note: in definition of macro '__trace_if'
      69 |                 ______r = !!(cond);                                     \
         |                              ^~~~
   arch/mips/include/asm/ptrace.h:86:9: note: in expansion of macro 'if'
      86 |         if (unlikely(offset > MAX_REG_OFFSET))
         |         ^~
   include/linux/compiler.h:48:26: note: in expansion of macro '__branch_check__'
      48 | #  define unlikely(x)   (__branch_check__(x, 0, __builtin_constant_p(x)))
         |                          ^~~~~~~~~~~~~~~~
   arch/mips/include/asm/ptrace.h:86:13: note: in expansion of macro 'unlikely'
      86 |         if (unlikely(offset > MAX_REG_OFFSET))
         |             ^~~~~~~~
   include/linux/compiler.h:64:25: note: previous declaration here
      64 |                         ______f = {                                     \
         |                         ^~~~~~~
   include/linux/compiler.h:56:23: note: in expansion of macro '__trace_if'
      56 | #define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) )
         |                       ^~~~~~~~~~
   arch/mips/include/asm/ptrace.h:86:9: note: in expansion of macro 'if'
      86 |         if (unlikely(offset > MAX_REG_OFFSET))
         |         ^~
   arch/mips/include/asm/ptrace.h: In function 'die_if_kernel':
   include/linux/compiler.h:25:39: warning: ignoring attribute 'section ("\"_ftrace_annotated_branch\"")' because it conflicts with previous 'section ("\"_ftrace_branch\"")' [-Wattributes]
      25 |                         static struct ftrace_likely_data                \
         |                                       ^~~~~~~~~~~~~~~~~~
   include/linux/compiler.h:69:30: note: in definition of macro '__trace_if'
      69 |                 ______r = !!(cond);                                     \
         |                              ^~~~
   arch/mips/include/asm/ptrace.h:171:9: note: in expansion of macro 'if'
     171 |         if (unlikely(!user_mode(regs)))
         |         ^~
   include/linux/compiler.h:48:26: note: in expansion of macro '__branch_check__'
      48 | #  define unlikely(x)   (__branch_check__(x, 0, __builtin_constant_p(x)))
         |                          ^~~~~~~~~~~~~~~~
   arch/mips/include/asm/ptrace.h:171:13: note: in expansion of macro 'unlikely'
     171 |         if (unlikely(!user_mode(regs)))
         |             ^~~~~~~~
   include/linux/compiler.h:64:25: note: previous declaration here
      64 |                         ______f = {                                     \
         |                         ^~~~~~~
   include/linux/compiler.h:56:23: note: in expansion of macro '__trace_if'
      56 | #define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) )
         |                       ^~~~~~~~~~
   arch/mips/include/asm/ptrace.h:171:9: note: in expansion of macro 'if'
     171 |         if (unlikely(!user_mode(regs)))
         |         ^~
   drivers/irqchip/irq-ath79-misc.c: At top level:
>> drivers/irqchip/irq-ath79-misc.c:29:5: warning: no previous prototype for 'get_c0_perfcount_int' [-Wmissing-prototypes]
      29 | int get_c0_perfcount_int(void)
         |     ^~~~~~~~~~~~~~~~~~~~
   drivers/irqchip/irq-ath79-misc.c:184:13: warning: no previous prototype for 'ath79_misc_irq_init' [-Wmissing-prototypes]
     184 | void __init ath79_misc_irq_init(void __iomem *regs, int irq,
         |             ^~~~~~~~~~~~~~~~~~~


vim +/get_c0_perfcount_int +29 drivers/irqchip/irq-ath79-misc.c

    28	
  > 29	int get_c0_perfcount_int(void)
    30	{
    31		return ath79_perfcount_irq;
    32	}
    33	EXPORT_SYMBOL_GPL(get_c0_perfcount_int);
    34	

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