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Date:   Sun, 15 Oct 2023 03:24:45 +0800
From:   kernel test robot <lkp@intel.com>
To:     Sergio Paracuellos <sergio.paracuellos@gmail.com>
Cc:     llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev,
        linux-kernel@vger.kernel.org,
        Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Subject: drivers/clk/ralink/clk-mtmips.c:821:34: warning: unused variable
 'mtmips_of_match'
Message-ID: <202310150352.KyKovpbT-lkp@intel.com>
MIME-Version: 1.0
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Precedence: bulk

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   70f8c6f8f8800d970b10676cceae42bba51a4899
commit: 6f3b15586eef736831abe6a14f2a6906bc0dc074 clk: ralink: add clock and reset driver for MTMIPS SoCs
date:   4 months ago
config: hexagon-randconfig-r016-20230817 (https://download.01.org/0day-ci/archive/20231015/202310150352.KyKovpbT-lkp@intel.com/config)
compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231015/202310150352.KyKovpbT-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/202310150352.KyKovpbT-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/clk/ralink/clk-mtmips.c:11:
   In file included from include/linux/regmap.h:20:
   In file included from include/linux/iopoll.h:14:
   In file included from include/linux/io.h:13:
   In file included from arch/hexagon/include/asm/io.h:334:
   include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           val = __raw_readb(PCI_IOBASE + addr);
                             ~~~~~~~~~~ ^
   include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                           ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
   #define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                     ^
   In file included from drivers/clk/ralink/clk-mtmips.c:11:
   In file included from include/linux/regmap.h:20:
   In file included from include/linux/iopoll.h:14:
   In file included from include/linux/io.h:13:
   In file included from arch/hexagon/include/asm/io.h:334:
   include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                           ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
   #define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                     ^
   In file included from drivers/clk/ralink/clk-mtmips.c:11:
   In file included from include/linux/regmap.h:20:
   In file included from include/linux/iopoll.h:14:
   In file included from include/linux/io.h:13:
   In file included from arch/hexagon/include/asm/io.h:334:
   include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           __raw_writeb(value, PCI_IOBASE + addr);
                               ~~~~~~~~~~ ^
   include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                         ~~~~~~~~~~ ^
   include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                         ~~~~~~~~~~ ^
   drivers/clk/ralink/clk-mtmips.c:309:9: warning: variable 'ret' is uninitialized when used here [-Wuninitialized]
           return ret;
                  ^~~
   drivers/clk/ralink/clk-mtmips.c:285:9: note: initialize the variable 'ret' to silence this warning
           int ret, i;
                  ^
                   = 0
   drivers/clk/ralink/clk-mtmips.c:359:9: warning: variable 'ret' is uninitialized when used here [-Wuninitialized]
           return ret;
                  ^~~
   drivers/clk/ralink/clk-mtmips.c:335:9: note: initialize the variable 'ret' to silence this warning
           int ret, i;
                  ^
                   = 0
>> drivers/clk/ralink/clk-mtmips.c:821:34: warning: unused variable 'mtmips_of_match' [-Wunused-const-variable]
   static const struct of_device_id mtmips_of_match[] = {
                                    ^
   9 warnings generated.


vim +/mtmips_of_match +821 drivers/clk/ralink/clk-mtmips.c

   820	
 > 821	static const struct of_device_id mtmips_of_match[] = {
   822		{
   823			.compatible = "ralink,rt2880-sysc",
   824			.data = &rt2880_clk_data,
   825		},
   826		{
   827			.compatible = "ralink,rt3050-sysc",
   828			.data = &rt305x_clk_data,
   829		},
   830		{
   831			.compatible = "ralink,rt3052-sysc",
   832			.data = &rt305x_clk_data,
   833		},
   834		{
   835			.compatible = "ralink,rt3352-sysc",
   836			.data = &rt3352_clk_data,
   837		},
   838		{
   839			.compatible = "ralink,rt3883-sysc",
   840			.data = &rt3883_clk_data,
   841		},
   842		{
   843			.compatible = "ralink,rt5350-sysc",
   844			.data = &rt5350_clk_data,
   845		},
   846		{
   847			.compatible = "ralink,mt7620-sysc",
   848			.data = &mt7620_clk_data,
   849		},
   850		{
   851			.compatible = "ralink,mt7628-sysc",
   852			.data = &mt76x8_clk_data,
   853		},
   854		{
   855			.compatible = "ralink,mt7688-sysc",
   856			.data = &mt76x8_clk_data,
   857		},
   858		{}
   859	};
   860	

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