Hi Juergen,

I love your patch! Yet something to improve:

[auto build test ERROR on linus/master]
[cannot apply to xen-tip/linux-next tip/x86/core tip/x86/asm v5.10 next-20201217]
[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]

url:    https://github.com/0day-ci/linux/commits/Juergen-Gross/x86-major-paravirt-cleanup/20201217-173646
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git accefff5b547a9a1d959c7e76ad539bf2480e78b
config: x86_64-randconfig-a002-20201217 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/0day-ci/linux/commit/bc3cbe0ff1b123a4b7f48c91b32198d7dfe57797
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Juergen-Gross/x86-major-paravirt-cleanup/20201217-173646
        git checkout bc3cbe0ff1b123a4b7f48c91b32198d7dfe57797
        # 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: kernel test robot <lkp@intel.com>

All error/warnings (new ones prefixed by >>):

   arch/x86/entry/entry_64.S: Assembler messages:
>> arch/x86/entry/entry_64.S:1092: Error: junk at end of line, first unrecognized character is `('
>> arch/x86/entry/entry_64.S:1092: Error: backward ref to unknown label "771:"
>> arch/x86/entry/entry_64.S:1092: Error: backward ref to unknown label "771:"
>> arch/x86/entry/entry_64.S:1092: Error: junk at end of line, first unrecognized character is `,'
>> arch/x86/entry/entry_64.S:1092: Warning: missing closing '"'
>> arch/x86/entry/entry_64.S:1092: Error: expecting mnemonic; got nothing


vim +1092 arch/x86/entry/entry_64.S

ddeb8f2149de280 arch/x86/kernel/entry_64.S Alexander van Heukelum 2008-11-24  1089  
424c7d0a9a396ba arch/x86/entry/entry_64.S  Thomas Gleixner        2020-03-26  1090  SYM_CODE_START_LOCAL(error_return)
424c7d0a9a396ba arch/x86/entry/entry_64.S  Thomas Gleixner        2020-03-26  1091  	UNWIND_HINT_REGS
424c7d0a9a396ba arch/x86/entry/entry_64.S  Thomas Gleixner        2020-03-26 @1092  	DEBUG_ENTRY_ASSERT_IRQS_OFF
424c7d0a9a396ba arch/x86/entry/entry_64.S  Thomas Gleixner        2020-03-26  1093  	testb	$3, CS(%rsp)
424c7d0a9a396ba arch/x86/entry/entry_64.S  Thomas Gleixner        2020-03-26  1094  	jz	restore_regs_and_return_to_kernel
424c7d0a9a396ba arch/x86/entry/entry_64.S  Thomas Gleixner        2020-03-26  1095  	jmp	swapgs_restore_regs_and_return_to_usermode
424c7d0a9a396ba arch/x86/entry/entry_64.S  Thomas Gleixner        2020-03-26  1096  SYM_CODE_END(error_return)
424c7d0a9a396ba arch/x86/entry/entry_64.S  Thomas Gleixner        2020-03-26  1097  

---
0-DAY CI Kernel Test Service, Intel Corporation
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