Hi Max,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 
master
head:   264800b5ecc7be49b2c6027738091ff3385e0cae
commit: 9da8320bb97768e35f2e64fa7642015271d672eb xtensa: add test_kc705_hifi 
variant
date:   2 weeks ago
config: xtensa-audio_kc705_defconfig (attached as .config)
reproduce:
        wget 
https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross
 -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 9da8320bb97768e35f2e64fa7642015271d672eb
        # save the attached .config to linux build tree
        make.cross ARCH=xtensa 

All errors (new ones prefixed by >>):

   arch/xtensa/kernel/coprocessor.S: Assembler messages:
>> arch/xtensa/kernel/coprocessor.S:93: Error: unknown opcode or format name 
>> 'rur.ae_ovf_sar'
>> arch/xtensa/kernel/coprocessor.S:93: Error: unknown opcode or format name 
>> 'rur.ae_bithead'
>> arch/xtensa/kernel/coprocessor.S:93: Error: unknown opcode or format name 
>> 'rur.ae_ts_fts_bu_bp'
>> arch/xtensa/kernel/coprocessor.S:93: Error: unknown opcode or format name 
>> 'rur.ae_cw_sd_no'
>> arch/xtensa/kernel/coprocessor.S:93: Error: unknown opcode or format name 
>> 'rur.ae_cbegin0'
>> arch/xtensa/kernel/coprocessor.S:93: Error: unknown opcode or format name 
>> 'rur.ae_cend0'
>> arch/xtensa/kernel/coprocessor.S:93: Error: unknown opcode or format name 
>> 'ae_s64.i'
>> arch/xtensa/kernel/coprocessor.S:93: Error: unknown opcode or format name 
>> 'ae_s64.i'
>> arch/xtensa/kernel/coprocessor.S:93: Error: unknown opcode or format name 
>> 'ae_s64.i'
>> arch/xtensa/kernel/coprocessor.S:93: Error: unknown opcode or format name 
>> 'ae_s64.i'
>> arch/xtensa/kernel/coprocessor.S:93: Error: unknown opcode or format name 
>> 'ae_s64.i'
>> arch/xtensa/kernel/coprocessor.S:93: Error: unknown opcode or format name 
>> 'ae_s64.i'
>> arch/xtensa/kernel/coprocessor.S:93: Error: unknown opcode or format name 
>> 'ae_s64.i'
>> arch/xtensa/kernel/coprocessor.S:93: Error: unknown opcode or format name 
>> 'ae_s64.i'
>> arch/xtensa/kernel/coprocessor.S:93: Error: unknown opcode or format name 
>> 'ae_s64.i'
>> arch/xtensa/kernel/coprocessor.S:93: Error: unknown opcode or format name 
>> 'ae_s64.i'
>> arch/xtensa/kernel/coprocessor.S:93: Error: unknown opcode or format name 
>> 'ae_s64.i'
>> arch/xtensa/kernel/coprocessor.S:93: Error: unknown opcode or format name 
>> 'ae_s64.i'
>> arch/xtensa/kernel/coprocessor.S:93: Error: unknown opcode or format name 
>> 'ae_s64.i'
>> arch/xtensa/kernel/coprocessor.S:93: Error: unknown opcode or format name 
>> 'ae_s64.i'
--
   arch/xtensa/include/asm/initialize_mmu.h: Assembler messages:
>> arch/xtensa/include/asm/initialize_mmu.h:55: Error: invalid register 
>> 'atomctl' for 'wsr' instruction

vim +93 arch/xtensa/kernel/coprocessor.S

c658eac6 Chris Zankel 2008-02-12   87   .else;                                  
                        \
c658eac6 Chris Zankel 2008-02-12   88           .long 0;                        
                        \
c658eac6 Chris Zankel 2008-02-12   89   .endif;                                 
                        \
c658eac6 Chris Zankel 2008-02-12   90   .long THREAD_XTREGS_CP##x
5a0015d6 Chris Zankel 2005-06-23   91  
c658eac6 Chris Zankel 2008-02-12   92   SAVE_CP_REGS(0)
c658eac6 Chris Zankel 2008-02-12  @93   SAVE_CP_REGS(1)
c658eac6 Chris Zankel 2008-02-12   94   SAVE_CP_REGS(2)
c658eac6 Chris Zankel 2008-02-12   95   SAVE_CP_REGS(3)
c658eac6 Chris Zankel 2008-02-12   96   SAVE_CP_REGS(4)
c658eac6 Chris Zankel 2008-02-12   97   SAVE_CP_REGS(5)
c658eac6 Chris Zankel 2008-02-12   98   SAVE_CP_REGS(6)
c658eac6 Chris Zankel 2008-02-12   99   SAVE_CP_REGS(7)
5a0015d6 Chris Zankel 2005-06-23  100  
c658eac6 Chris Zankel 2008-02-12  101   LOAD_CP_REGS(0)
c658eac6 Chris Zankel 2008-02-12 @102   LOAD_CP_REGS(1)
c658eac6 Chris Zankel 2008-02-12  103   LOAD_CP_REGS(2)
c658eac6 Chris Zankel 2008-02-12  104   LOAD_CP_REGS(3)
c658eac6 Chris Zankel 2008-02-12  105   LOAD_CP_REGS(4)

:::::: The code at line 93 was first introduced by commit
:::::: c658eac628aa8df040dfe614556d95e6da3a9ffb [XTENSA] Add support for 
configurable registers and coprocessors

:::::: TO: Chris Zankel <ch...@zankel.net>
:::::: CC: Chris Zankel <ch...@zankel.net>

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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