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Date: Thu, 25 Jan 2024 22:06:31 +0800
From: kernel test robot <lkp@intel.com>
To: Gowthami Thiagarajan <gthiagarajan@marvell.com>, will@kernel.org,
	mark.rutland@arm.com, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev,
	sgoutham@marvell.com, bbhushan2@marvell.com,
	george.cherian@marvell.com,
	Gowthami Thiagarajan <gthiagarajan@marvell.com>
Subject: Re: [PATCH v3 1/2] perf/marvell: Odyssey DDR Performance monitor
 support
Message-ID: <202401252104.CFnKSeTe-lkp@intel.com>
References: <20240122124933.1311925-2-gthiagarajan@marvell.com>
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In-Reply-To: <20240122124933.1311925-2-gthiagarajan@marvell.com>

Hi Gowthami,

kernel test robot noticed the following build warnings:

[auto build test WARNING on soc/for-next]
[also build test WARNING on linus/master v6.8-rc1 next-20240125]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Gowthami-Thiagarajan/perf-marvell-Odyssey-DDR-Performance-monitor-support/20240122-205209
base:   https://git.kernel.org/pub/scm/linux/kernel/git/soc/soc.git for-next
patch link:    https://lore.kernel.org/r/20240122124933.1311925-2-gthiagarajan%40marvell.com
patch subject: [PATCH v3 1/2] perf/marvell: Odyssey DDR Performance monitor support
config: s390-randconfig-001-20240125 (https://download.01.org/0day-ci/archive/20240125/202401252104.CFnKSeTe-lkp@intel.com/config)
compiler: clang version 18.0.0git (https://github.com/llvm/llvm-project a31a60074717fc40887cfe132b77eec93bedd307)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240125/202401252104.CFnKSeTe-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/202401252104.CFnKSeTe-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/perf/marvell_cn10k_ddr_pmu.c:9:
   In file included from include/linux/io.h:13:
   In file included from arch/s390/include/asm/io.h:78:
   include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     547 |         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]
     560 |         val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
         |                                                         ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/big_endian.h:37:59: note: expanded from macro '__le16_to_cpu'
      37 | #define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x))
         |                                                           ^
   include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16'
     102 | #define __swab16(x) (__u16)__builtin_bswap16((__u16)(x))
         |                                                      ^
   In file included from drivers/perf/marvell_cn10k_ddr_pmu.c:9:
   In file included from include/linux/io.h:13:
   In file included from arch/s390/include/asm/io.h:78:
   include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     573 |         val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
         |                                                         ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/big_endian.h:35:59: note: expanded from macro '__le32_to_cpu'
      35 | #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
         |                                                           ^
   include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32'
     115 | #define __swab32(x) (__u32)__builtin_bswap32((__u32)(x))
         |                                                      ^
   In file included from drivers/perf/marvell_cn10k_ddr_pmu.c:9:
   In file included from include/linux/io.h:13:
   In file included from arch/s390/include/asm/io.h:78:
   include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     584 |         __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]
     594 |         __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]
     604 |         __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
         |                                                       ~~~~~~~~~~ ^
   include/asm-generic/io.h:692:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     692 |         readsb(PCI_IOBASE + addr, buffer, count);
         |                ~~~~~~~~~~ ^
   include/asm-generic/io.h:700:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     700 |         readsw(PCI_IOBASE + addr, buffer, count);
         |                ~~~~~~~~~~ ^
   include/asm-generic/io.h:708:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     708 |         readsl(PCI_IOBASE + addr, buffer, count);
         |                ~~~~~~~~~~ ^
   include/asm-generic/io.h:717:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     717 |         writesb(PCI_IOBASE + addr, buffer, count);
         |                 ~~~~~~~~~~ ^
   include/asm-generic/io.h:726:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     726 |         writesw(PCI_IOBASE + addr, buffer, count);
         |                 ~~~~~~~~~~ ^
   include/asm-generic/io.h:735:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     735 |         writesl(PCI_IOBASE + addr, buffer, count);
         |                 ~~~~~~~~~~ ^
>> drivers/perf/marvell_cn10k_ddr_pmu.c:179:43: warning: unused variable 'cn10k_ddr_pmu_pdata' [-Wunused-const-variable]
     179 | static const struct ddr_pmu_platform_data cn10k_ddr_pmu_pdata = {
         |                                           ^~~~~~~~~~~~~~~~~~~
>> drivers/perf/marvell_cn10k_ddr_pmu.c:195:43: warning: unused variable 'odyssey_ddr_pmu_pdata' [-Wunused-const-variable]
     195 | static const struct ddr_pmu_platform_data odyssey_ddr_pmu_pdata = {
         |                                           ^~~~~~~~~~~~~~~~~~~~~
   14 warnings generated.


vim +/cn10k_ddr_pmu_pdata +179 drivers/perf/marvell_cn10k_ddr_pmu.c

   178	
 > 179	static const struct ddr_pmu_platform_data cn10k_ddr_pmu_pdata = {
   180		.counter_overflow_val =  BIT_ULL(48),
   181		.counter_max_val = GENMASK_ULL(48, 0),
   182		.ddrc_perf_cnt_base = CN10K_DDRC_PERF_CNT_VALUE_BASE,
   183		.ddrc_perf_cfg_base = CN10K_DDRC_PERF_CFG_BASE,
   184		.ddrc_perf_cnt_op_mode_ctrl = CN10K_DDRC_PERF_CNT_OP_MODE_CTRL,
   185		.ddrc_perf_cnt_start_op_ctrl = CN10K_DDRC_PERF_CNT_START_OP_CTRL,
   186		.ddrc_perf_cnt_end_op_ctrl = CN10K_DDRC_PERF_CNT_END_OP_CTRL,
   187		.ddrc_perf_cnt_end_status = CN10K_DDRC_PERF_CNT_END_STATUS,
   188		.ddrc_perf_cnt_freerun_en = CN10K_DDRC_PERF_CNT_FREERUN_EN,
   189		.ddrc_perf_cnt_freerun_ctrl = CN10K_DDRC_PERF_CNT_FREERUN_CTRL,
   190		.ddrc_perf_cnt_freerun_clr = 0,
   191		.ddrc_perf_cnt_value_wr_op = CN10K_DDRC_PERF_CNT_VALUE_WR_OP,
   192		.ddrc_perf_cnt_value_rd_op = CN10K_DDRC_PERF_CNT_VALUE_RD_OP,
   193	};
   194	
 > 195	static const struct ddr_pmu_platform_data odyssey_ddr_pmu_pdata = {
   196		.counter_overflow_val = 0,
   197		.counter_max_val = GENMASK_ULL(63, 0),
   198		.ddrc_perf_cnt_base = ODY_DDRC_PERF_CNT_VALUE_BASE,
   199		.ddrc_perf_cfg_base = ODY_DDRC_PERF_CFG_BASE,
   200		.ddrc_perf_cnt_op_mode_ctrl = ODY_DDRC_PERF_CNT_OP_MODE_CTRL,
   201		.ddrc_perf_cnt_start_op_ctrl = ODY_DDRC_PERF_CNT_START_OP_CTRL,
   202		.ddrc_perf_cnt_end_op_ctrl = ODY_DDRC_PERF_CNT_END_OP_CTRL,
   203		.ddrc_perf_cnt_end_status = ODY_DDRC_PERF_CNT_END_STATUS,
   204		.ddrc_perf_cnt_freerun_en = 0,
   205		.ddrc_perf_cnt_freerun_ctrl = ODY_DDRC_PERF_CNT_FREERUN_CTRL,
   206		.ddrc_perf_cnt_freerun_clr = ODY_DDRC_PERF_CNT_FREERUN_CLR,
   207		.ddrc_perf_cnt_value_wr_op = ODY_DDRC_PERF_CNT_VALUE_WR_OP,
   208		.ddrc_perf_cnt_value_rd_op = ODY_DDRC_PERF_CNT_VALUE_RD_OP,
   209	};
   210	

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