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Date:   Sat, 30 Jul 2022 21:10:17 +0800
From:   kernel test robot <lkp@intel.com>
To:     Liu Chao <liuchao173@huawei.com>, linux-kernel@vger.kernel.org,
        tglx@linutronix.de
Cc:     llvm@lists.linux.dev, kbuild-all@lists.01.org,
        hewenliang4@huawei.com, linfeilong@huawei.com
Subject: Re: [PATCH] add miss time to CPUTIME_USER when kernel boots with
 highres=off
Message-ID: <202207302033.Sreft8cI-lkp@intel.com>
References: <20220730091456.3741503-1-liuchao173@huawei.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
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In-Reply-To: <20220730091456.3741503-1-liuchao173@huawei.com>
Precedence: bulk

Hi Liu,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on tip/timers/core]
[also build test ERROR on linus/master v5.19-rc8 next-20220728]
[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/Liu-Chao/add-miss-time-to-CPUTIME_USER-when-kernel-boots-with-highres-off/20220730-171718
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git cceeeb6a6d02e7b9a74ddd27a3225013b34174aa
config: s390-randconfig-r044-20220729 (https://download.01.org/0day-ci/archive/20220730/202207302033.Sreft8cI-lkp@intel.com/config)
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 52cd00cabf479aa7eb6dbb063b7ba41ea57bce9e)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install s390 cross compiling tool for clang build
        # apt-get install binutils-s390x-linux-gnu
        # https://github.com/intel-lab-lkp/linux/commit/7ac63e1383163d700eb4212b689a272a4763e185
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Liu-Chao/add-miss-time-to-CPUTIME_USER-when-kernel-boots-with-highres-off/20220730-171718
        git checkout 7ac63e1383163d700eb4212b689a272a4763e185
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash kernel/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   In file included from kernel/time/hrtimer.c:32:
   In file included from include/linux/tick.h:8:
   In file included from include/linux/clockchips.h:14:
   In file included from include/linux/clocksource.h:22:
   In file included from arch/s390/include/asm/io.h:75:
   include/asm-generic/io.h:464:31: 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:477:61: 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/big_endian.h:37:59: note: expanded from macro '__le16_to_cpu'
   #define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x))
                                                             ^
   include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16'
   #define __swab16(x) (__u16)__builtin_bswap16((__u16)(x))
                                                        ^
   In file included from kernel/time/hrtimer.c:32:
   In file included from include/linux/tick.h:8:
   In file included from include/linux/clockchips.h:14:
   In file included from include/linux/clocksource.h:22:
   In file included from arch/s390/include/asm/io.h:75:
   include/asm-generic/io.h:490:61: 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/big_endian.h:35:59: note: expanded from macro '__le32_to_cpu'
   #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
                                                             ^
   include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32'
   #define __swab32(x) (__u32)__builtin_bswap32((__u32)(x))
                                                        ^
   In file included from kernel/time/hrtimer.c:32:
   In file included from include/linux/tick.h:8:
   In file included from include/linux/clockchips.h:14:
   In file included from include/linux/clocksource.h:22:
   In file included from arch/s390/include/asm/io.h:75:
   include/asm-generic/io.h:501:33: 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:511:59: 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:521:59: 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);
                                                         ~~~~~~~~~~ ^
   include/asm-generic/io.h:609:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           readsb(PCI_IOBASE + addr, buffer, count);
                  ~~~~~~~~~~ ^
   include/asm-generic/io.h:617:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           readsw(PCI_IOBASE + addr, buffer, count);
                  ~~~~~~~~~~ ^
   include/asm-generic/io.h:625:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           readsl(PCI_IOBASE + addr, buffer, count);
                  ~~~~~~~~~~ ^
   include/asm-generic/io.h:634:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           writesb(PCI_IOBASE + addr, buffer, count);
                   ~~~~~~~~~~ ^
   include/asm-generic/io.h:643:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           writesw(PCI_IOBASE + addr, buffer, count);
                   ~~~~~~~~~~ ^
   include/asm-generic/io.h:652:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           writesl(PCI_IOBASE + addr, buffer, count);
                   ~~~~~~~~~~ ^
   kernel/time/hrtimer.c:120:21: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
           [CLOCK_REALTIME]        = HRTIMER_BASE_REALTIME,
                                     ^~~~~~~~~~~~~~~~~~~~~
   kernel/time/hrtimer.c:118:27: note: previous initialization is here
           [0 ... MAX_CLOCKS - 1]  = HRTIMER_MAX_CLOCK_BASES,
                                     ^~~~~~~~~~~~~~~~~~~~~~~
   kernel/time/hrtimer.c:121:22: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
           [CLOCK_MONOTONIC]       = HRTIMER_BASE_MONOTONIC,
                                     ^~~~~~~~~~~~~~~~~~~~~~
   kernel/time/hrtimer.c:118:27: note: previous initialization is here
           [0 ... MAX_CLOCKS - 1]  = HRTIMER_MAX_CLOCK_BASES,
                                     ^~~~~~~~~~~~~~~~~~~~~~~
   kernel/time/hrtimer.c:122:21: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
           [CLOCK_BOOTTIME]        = HRTIMER_BASE_BOOTTIME,
                                     ^~~~~~~~~~~~~~~~~~~~~
   kernel/time/hrtimer.c:118:27: note: previous initialization is here
           [0 ... MAX_CLOCKS - 1]  = HRTIMER_MAX_CLOCK_BASES,
                                     ^~~~~~~~~~~~~~~~~~~~~~~
   kernel/time/hrtimer.c:123:17: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
           [CLOCK_TAI]             = HRTIMER_BASE_TAI,
                                     ^~~~~~~~~~~~~~~~
   kernel/time/hrtimer.c:118:27: note: previous initialization is here
           [0 ... MAX_CLOCKS - 1]  = HRTIMER_MAX_CLOCK_BASES,
                                     ^~~~~~~~~~~~~~~~~~~~~~~
>> kernel/time/hrtimer.c:754:19: error: static declaration of 'hrtimer_is_hres_enabled' follows non-static declaration
   static inline int hrtimer_is_hres_enabled(void) { return 0; }
                     ^
   include/linux/hrtimer.h:329:12: note: previous declaration is here
   extern int hrtimer_is_hres_enabled(void);
              ^
   16 warnings and 1 error generated.


vim +/hrtimer_is_hres_enabled +754 kernel/time/hrtimer.c

54cdfdb47f73b5 kernel/hrtimer.c      Thomas Gleixner 2007-02-16  753  
54cdfdb47f73b5 kernel/hrtimer.c      Thomas Gleixner 2007-02-16 @754  static inline int hrtimer_is_hres_enabled(void) { return 0; }
75e3b37d059856 kernel/time/hrtimer.c Luiz Capitulino 2015-08-11  755  static inline void hrtimer_switch_to_hres(void) { }
54cdfdb47f73b5 kernel/hrtimer.c      Thomas Gleixner 2007-02-16  756  

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