linux-kernel - drivers/platform/mips/rs780e-acpi.c:47:6: warning: no previous prototype for 'pm2

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Message-ID: <202311301354.Ga1imV7I-lkp@intel.com>
Date:   Thu, 30 Nov 2023 13:03:35 +0800
From:   kernel test robot <lkp@...el.com>
To:     Jiaxun Yang <jiaxun.yang@...goat.com>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Subject: drivers/platform/mips/rs780e-acpi.c:47:6: warning: no previous
 prototype for 'pm2_iowrite'

Hi Jiaxun,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   3b47bc037bd44f142ac09848e8d3ecccc726be99
commit: 0cfd2440aa03ea3d4b04cc2565561cecadcb1257 MIPS: Loongson64: Make RS780E ACPI as a platform driver
date:   3 years, 7 months ago
config: mips-allyesconfig (https://download.01.org/0day-ci/archive/20231130/202311301354.Ga1imV7I-lkp@intel.com/config)
compiler: mips-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231130/202311301354.Ga1imV7I-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/202311301354.Ga1imV7I-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/platform/mips/rs780e-acpi.c:35:6: warning: no previous prototype for 'pm_iowrite' [-Wmissing-prototypes]
      35 | void pm_iowrite(u8 reg, u8 value)
         |      ^~~~~~~~~~
   drivers/platform/mips/rs780e-acpi.c:41:4: warning: no previous prototype for 'pm_ioread' [-Wmissing-prototypes]
      41 | u8 pm_ioread(u8 reg)
         |    ^~~~~~~~~
>> drivers/platform/mips/rs780e-acpi.c:47:6: warning: no previous prototype for 'pm2_iowrite' [-Wmissing-prototypes]
      47 | void pm2_iowrite(u8 reg, u8 value)
         |      ^~~~~~~~~~~
>> drivers/platform/mips/rs780e-acpi.c:53:4: warning: no previous prototype for 'pm2_ioread' [-Wmissing-prototypes]
      53 | u8 pm2_ioread(u8 reg)
         |    ^~~~~~~~~~
   drivers/platform/mips/rs780e-acpi.c:72:6: warning: no previous prototype for 'acpi_registers_setup' [-Wmissing-prototypes]
      72 | void acpi_registers_setup(void)
         |      ^~~~~~~~~~~~~~~~~~~~


vim +/pm2_iowrite +47 drivers/platform/mips/rs780e-acpi.c

9c057b3e02184b drivers/platform/mips/acpi_init.c Huacai Chen 2015-03-29  46  
9c057b3e02184b drivers/platform/mips/acpi_init.c Huacai Chen 2015-03-29 @47  void pm2_iowrite(u8 reg, u8 value)
9c057b3e02184b drivers/platform/mips/acpi_init.c Huacai Chen 2015-03-29  48  {
9c057b3e02184b drivers/platform/mips/acpi_init.c Huacai Chen 2015-03-29  49  	pmio_write_index(PM2_INDEX, reg, value);
9c057b3e02184b drivers/platform/mips/acpi_init.c Huacai Chen 2015-03-29  50  }
9c057b3e02184b drivers/platform/mips/acpi_init.c Huacai Chen 2015-03-29  51  EXPORT_SYMBOL(pm2_iowrite);
9c057b3e02184b drivers/platform/mips/acpi_init.c Huacai Chen 2015-03-29  52  
9c057b3e02184b drivers/platform/mips/acpi_init.c Huacai Chen 2015-03-29 @53  u8 pm2_ioread(u8 reg)
9c057b3e02184b drivers/platform/mips/acpi_init.c Huacai Chen 2015-03-29  54  {
9c057b3e02184b drivers/platform/mips/acpi_init.c Huacai Chen 2015-03-29  55  	return pmio_read_index(PM2_INDEX, reg);
9c057b3e02184b drivers/platform/mips/acpi_init.c Huacai Chen 2015-03-29  56  }
9c057b3e02184b drivers/platform/mips/acpi_init.c Huacai Chen 2015-03-29  57  EXPORT_SYMBOL(pm2_ioread);
9c057b3e02184b drivers/platform/mips/acpi_init.c Huacai Chen 2015-03-29  58  

:::::: The code at line 47 was first introduced by commit
:::::: 9c057b3e02184b111d3392be75efc7c94f0fdf20 MIPS: Loongson-3: Add chipset ACPI platform driver

:::::: TO: Huacai Chen <chenhc@...ote.com>
:::::: CC: Ralf Baechle <ralf@...ux-mips.org>

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki