Re: [RFC][PATCH 3/4] x86/entry: Remove debug IST frobbing

From: kbuild test robot <lkp@intel.com>
To: kbuild-all@lists.01.org
Subject: Re: [RFC][PATCH 3/4] x86/entry: Remove debug IST frobbing
Date: Mon, 25 May 2020 20:33:53 +0800	[thread overview]
Message-ID: <202005252029.iTfdizIE%lkp@intel.com> (raw)
In-Reply-To: <20200522204943.350442553@infradead.org>

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Hi Peter,

[FYI, it's a private test report for your RFC patch.]
[auto build test ERROR on tip/auto-latest]
[cannot apply to tip/x86/core luto/next v5.7-rc7 next-20200522]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Peter-Zijlstra/x86-entry-disallow-DB-more/20200523-045236
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git 82c5ba14c091497fc5d79ee017f962e50c3f69ac
config: x86_64-rhel-7.6-kselftests (attached as .config)
compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
reproduce (this is a W=1 build):
        # save the attached .config to linux build tree
        make W=1 ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <lkp@intel.com>

All errors (new ones prefixed by >>, old ones prefixed by <<):

ld: arch/x86/entry/entry_64.o: in function `asm_exc_debug':
>> arch/x86/include/asm/idtentry.h:368: undefined reference to `debug_stack_set_zero'
>> ld: arch/x86/include/asm/idtentry.h:368: undefined reference to `debug_stack_reset'
ld: arch/x86/entry/entry_64.o: in function `paranoid_exit':
>> arch/x86/entry/entry_64.S:1281: undefined reference to `debug_stack_set_zero'
>> ld: arch/x86/entry/entry_64.S:1281: undefined reference to `debug_stack_reset'
>> ld: arch/x86/entry/entry_64.S:1290: undefined reference to `debug_stack_set_zero'
ld: arch/x86/entry/entry_64.S:1290: undefined reference to `debug_stack_reset'
Segmentation fault
.btf.vmlinux.bin.o: file not recognized: file format not recognized

vim +368 arch/x86/include/asm/idtentry.h

b209b183b6db50 Thomas Gleixner 2020-02-25  366  
c087b87b146916 Thomas Gleixner 2020-02-25  367  /* #DB */
c087b87b146916 Thomas Gleixner 2020-02-25 @368  DECLARE_IDTENTRY_DEBUG(X86_TRAP_DB,	exc_debug);
c087b87b146916 Thomas Gleixner 2020-02-25  369  DECLARE_IDTENTRY_XEN(X86_TRAP_DB,	debug);
c087b87b146916 Thomas Gleixner 2020-02-25  370  

:::::: The code at line 368 was first introduced by commit
:::::: c087b87b1469166dbb0d757c7d79fecf14a90a0a x86/entry: Convert Debug exception to IDTENTRY_DB

:::::: TO: Thomas Gleixner <tglx@linutronix.de>
:::::: CC: Thomas Gleixner <tglx@linutronix.de>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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