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Date:   Sun, 3 Jan 2021 07:11:12 +0800
From:   kernel test robot <>
To:     Thomas Gleixner <>
        Frederic Weisbecker <>,
        Valentin Schneider <>
Subject: drivers/rtc/rtc-pcf8523.c:35: warning: "REG_OFFSET" redefined

tree: master
head:   eda809aef53426d044b519405d25d9da55319b76
commit: 7fd70c65faacd39628ba5f670be6490010c8132f ARM: irqstat: Get rid of duplicated declaration
date:   6 weeks ago
config: arm-randconfig-p001-20210103 (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git remote add linus
        git fetch --no-tags linus master
        git checkout 7fd70c65faacd39628ba5f670be6490010c8132f
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <>

All warnings (new ones prefixed by >>):

>> drivers/rtc/rtc-pcf8523.c:35: warning: "REG_OFFSET" redefined
      35 | #define REG_OFFSET   0x0e
   In file included from arch/arm/mach-ixp4xx/include/mach/hardware.h:30,
                    from arch/arm/mach-ixp4xx/include/mach/io.h:15,
                    from arch/arm/include/asm/io.h:198,
                    from include/linux/io.h:13,
                    from include/linux/irq.h:20,
                    from include/asm-generic/hardirq.h:13,
                    from arch/arm/include/asm/hardirq.h:10,
                    from include/linux/hardirq.h:10,
                    from include/linux/interrupt.h:11,
                    from include/linux/rtc.h:17,
                    from drivers/rtc/rtc-pcf8523.c:9:
   arch/arm/mach-ixp4xx/include/mach/platform.h:23: note: this is the location of the previous definition
      23 | #define REG_OFFSET 0

vim +/REG_OFFSET +35 drivers/rtc/rtc-pcf8523.c

f803f0d079ded4 Thierry Reding 2012-12-17  34  
bc3bee02527252 Russell King   2017-09-29 @35  #define REG_OFFSET   0x0e
bc3bee02527252 Russell King   2017-09-29  36  #define REG_OFFSET_MODE BIT(7)
bc3bee02527252 Russell King   2017-09-29  37  

:::::: The code at line 35 was first introduced by commit
:::::: bc3bee0252725240ffa62180d387cc245179c549 rtc: pcf8523: add support for trimming the RTC oscillator

:::::: TO: Russell King <>
:::::: CC: Alexandre Belloni <>

0-DAY CI Kernel Test Service, Intel Corporation

Download attachment ".config.gz" of type "application/gzip" (36350 bytes)

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