linux-kernel - include/linux/compiler.h:183: undefined reference to `__tracepoint_dwc3

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Date:   Sun, 18 Feb 2018 22:00:07 +0800
From:   kbuild test robot <fengguang.wu@...el.com>
To:     Zhenyu Wang <zhenyuw@...ux.intel.com>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org,
        Zhi Wang <zhi.a.wang@...el.com>
Subject: include/linux/compiler.h:183: undefined reference to
 `__tracepoint_dwc3_readl'

Hi Zhenyu,

It's probably a bug fix that unveils the link errors.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   c786427f57b6dc4f56f9a84da52b41216e94f125
commit: c20164dbd508c410f5d5f6b121e6cfae7c2da8ba drm/i915/gvt: always use i915_reg_t for MMIO handler definition
date:   8 weeks ago
config: x86_64-randconfig-h0-02181955 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
        git checkout c20164dbd508c410f5d5f6b121e6cfae7c2da8ba
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   drivers/usb/dwc3/core.o: In function `__read_once_size':
>> include/linux/compiler.h:183: undefined reference to `__tracepoint_dwc3_readl'
>> include/linux/compiler.h:183: undefined reference to `__tracepoint_dwc3_readl'
>> include/linux/compiler.h:183: undefined reference to `__tracepoint_dwc3_writel'
>> include/linux/compiler.h:183: undefined reference to `__tracepoint_dwc3_writel'
>> include/linux/compiler.h:183: undefined reference to `__tracepoint_dwc3_writel'
>> include/linux/compiler.h:183: undefined reference to `__tracepoint_dwc3_writel'
>> include/linux/compiler.h:183: undefined reference to `__tracepoint_dwc3_readl'
>> include/linux/compiler.h:183: undefined reference to `__tracepoint_dwc3_readl'
>> include/linux/compiler.h:183: undefined reference to `__tracepoint_dwc3_writel'
>> include/linux/compiler.h:183: undefined reference to `__tracepoint_dwc3_writel'
>> include/linux/compiler.h:183: undefined reference to `__tracepoint_dwc3_writel'
>> include/linux/compiler.h:183: undefined reference to `__tracepoint_dwc3_writel'
>> include/linux/compiler.h:183: undefined reference to `__tracepoint_dwc3_writel'
   drivers/usb/dwc3/core.o:include/linux/compiler.h:183: more undefined references to `__tracepoint_dwc3_writel' follow
   drivers/usb/dwc3/core.o: In function `__read_once_size':
>> include/linux/compiler.h:183: undefined reference to `__tracepoint_dwc3_readl'
>> include/linux/compiler.h:183: undefined reference to `__tracepoint_dwc3_readl'
>> include/linux/compiler.h:183: undefined reference to `__tracepoint_dwc3_writel'
>> include/linux/compiler.h:183: undefined reference to `__tracepoint_dwc3_writel'
>> include/linux/compiler.h:183: undefined reference to `__tracepoint_dwc3_readl'
>> include/linux/compiler.h:183: undefined reference to `__tracepoint_dwc3_readl'
>> include/linux/compiler.h:183: undefined reference to `__tracepoint_dwc3_readl'

vim +183 include/linux/compiler.h

d976441f Andrey Ryabinin       2015-10-19  179  
d976441f Andrey Ryabinin       2015-10-19  180  static __always_inline
d976441f Andrey Ryabinin       2015-10-19  181  void __read_once_size(const volatile void *p, void *res, int size)
230fa253 Christian Borntraeger 2014-11-25  182  {
d976441f Andrey Ryabinin       2015-10-19 @183  	__READ_ONCE_SIZE;
230fa253 Christian Borntraeger 2014-11-25  184  }
d976441f Andrey Ryabinin       2015-10-19  185  

:::::: The code at line 183 was first introduced by commit
:::::: d976441f44bc5d48635d081d277aa76556ffbf8b compiler, atomics, kasan: Provide READ_ONCE_NOCHECK()

:::::: TO: Andrey Ryabinin <aryabinin@...tuozzo.com>
:::::: CC: Ingo Molnar <mingo@...nel.org>

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