Hi Paul,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   7ca4ad5ba886557b67d42242a80f303c3a99ded1
commit: 21e3134b3ec09e722cbcda69788f206adc8db1f4 MIPS: barrier: Clean up rmb() & wmb() definitions
date:   3 months ago
config: mips-randconfig-a001-20200103 (attached as .config)
compiler: mipsel-linux-gcc (GCC) 7.4.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 21e3134b3ec09e722cbcda69788f206adc8db1f4
        # save the attached .config to linux build tree
        GCC_VERSION=7.4.0 make.cross ARCH=mips 

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

All errors (new ones prefixed by >>):

   {standard input}: Assembler messages:
>> {standard input}:1932: Error: found '(', expected: ')'
>> {standard input}:1932: Error: found '(', expected: ')'
>> {standard input}:1932: Error: non-constant expression in ".if" statement
>> {standard input}:1932: Error: junk at end of line, first unrecognized character is `('
--
   {standard input}: Assembler messages:
   {standard input}:1020: Error: found '(', expected: ')'
   {standard input}:1020: Error: found '(', expected: ')'
   {standard input}:1020: Error: non-constant expression in ".if" statement
   {standard input}:1020: Error: junk at end of line, first unrecognized character is `('
   {standard input}:1111: Error: found '(', expected: ')'
   {standard input}:1111: Error: found '(', expected: ')'
   {standard input}:1111: Error: non-constant expression in ".if" statement
   {standard input}:1111: Error: junk at end of line, first unrecognized character is `('
   {standard input}:1128: Error: found '(', expected: ')'
   {standard input}:1128: Error: found '(', expected: ')'
   {standard input}:1128: Error: non-constant expression in ".if" statement
   {standard input}:1128: Error: junk at end of line, first unrecognized character is `('
   {standard input}:1145: Error: found '(', expected: ')'
   {standard input}:1145: Error: found '(', expected: ')'
   {standard input}:1145: Error: non-constant expression in ".if" statement
   {standard input}:1145: Error: junk at end of line, first unrecognized character is `('
   {standard input}:1162: Error: found '(', expected: ')'
   {standard input}:1162: Error: found '(', expected: ')'
   {standard input}:1162: Error: non-constant expression in ".if" statement
   {standard input}:1162: Error: junk at end of line, first unrecognized character is `('
   {standard input}:1211: Error: found '(', expected: ')'
   {standard input}:1211: Error: found '(', expected: ')'
   {standard input}:1211: Error: non-constant expression in ".if" statement
   {standard input}:1211: Error: junk at end of line, first unrecognized character is `('
   {standard input}:1228: Error: found '(', expected: ')'
   {standard input}:1228: Error: found '(', expected: ')'
   {standard input}:1228: Error: non-constant expression in ".if" statement
   {standard input}:1228: Error: junk at end of line, first unrecognized character is `('
   {standard input}:1245: Error: found '(', expected: ')'
   {standard input}:1245: Error: found '(', expected: ')'
   {standard input}:1245: Error: non-constant expression in ".if" statement
   {standard input}:1245: Error: junk at end of line, first unrecognized character is `('
   {standard input}:1262: Error: found '(', expected: ')'
   {standard input}:1262: Error: found '(', expected: ')'
   {standard input}:1262: Error: non-constant expression in ".if" statement
   {standard input}:1262: Error: junk at end of line, first unrecognized character is `('
   {standard input}:1363: Error: found '(', expected: ')'
   {standard input}:1363: Error: found '(', expected: ')'
   {standard input}:1363: Error: non-constant expression in ".if" statement
   {standard input}:1363: Error: junk at end of line, first unrecognized character is `('
   {standard input}:1396: Error: found '(', expected: ')'
   {standard input}:1396: Error: found '(', expected: ')'
   {standard input}:1396: Error: non-constant expression in ".if" statement
   {standard input}:1396: Error: junk at end of line, first unrecognized character is `('
>> {standard input}:1932: Error: found '(', expected: ')'
>> {standard input}:1932: Error: found '(', expected: ')'
>> {standard input}:1932: Error: non-constant expression in ".if" statement
>> {standard input}:1932: Error: junk at end of line, first unrecognized character is `('
   {standard input}:1948: Error: found '(', expected: ')'
   {standard input}:1948: Error: found '(', expected: ')'
   {standard input}:1948: Error: non-constant expression in ".if" statement
   {standard input}:1948: Error: junk at end of line, first unrecognized character is `('
   {standard input}:2467: Error: found '(', expected: ')'
   {standard input}:2467: Error: found '(', expected: ')'
   {standard input}:2467: Error: non-constant expression in ".if" statement
   {standard input}:2467: Error: junk at end of line, first unrecognized character is `('
   {standard input}:2517: Error: found '(', expected: ')'
   {standard input}:2517: Error: found '(', expected: ')'
   {standard input}:2517: Error: non-constant expression in ".if" statement
   {standard input}:2517: Error: junk at end of line, first unrecognized character is `('
   {standard input}:3845: Error: found '(', expected: ')'
   {standard input}:3845: Error: found '(', expected: ')'
   {standard input}:3845: Error: non-constant expression in ".if" statement
   {standard input}:3845: Error: junk at end of line, first unrecognized character is `('
   {standard input}:3891: Error: found '(', expected: ')'
   {standard input}:3891: Error: found '(', expected: ')'
   {standard input}:3891: Error: non-constant expression in ".if" statement
   {standard input}:3891: Error: junk at end of line, first unrecognized character is `('
--
   {standard input}: Assembler messages:
   {standard input}:915: Error: found '(', expected: ')'
   {standard input}:915: Error: found '(', expected: ')'
   {standard input}:915: Error: non-constant expression in ".if" statement
   {standard input}:915: Error: junk at end of line, first unrecognized character is `('
   {standard input}:955: Error: found '(', expected: ')'
   {standard input}:955: Error: found '(', expected: ')'
   {standard input}:955: Error: non-constant expression in ".if" statement
   {standard input}:955: Error: junk at end of line, first unrecognized character is `('
   {standard input}:1001: Error: found '(', expected: ')'
   {standard input}:1001: Error: found '(', expected: ')'
   {standard input}:1001: Error: non-constant expression in ".if" statement
   {standard input}:1001: Error: junk at end of line, first unrecognized character is `('
   {standard input}:1077: Error: found '(', expected: ')'
   {standard input}:1077: Error: found '(', expected: ')'
   {standard input}:1077: Error: non-constant expression in ".if" statement
   {standard input}:1077: Error: junk at end of line, first unrecognized character is `('
   {standard input}:1154: Error: found '(', expected: ')'
   {standard input}:1154: Error: found '(', expected: ')'
   {standard input}:1154: Error: non-constant expression in ".if" statement
   {standard input}:1154: Error: junk at end of line, first unrecognized character is `('
   {standard input}:1242: Error: found '(', expected: ')'
   {standard input}:1242: Error: found '(', expected: ')'
   {standard input}:1242: Error: non-constant expression in ".if" statement
   {standard input}:1242: Error: junk at end of line, first unrecognized character is `('
   {standard input}:1457: Error: found '(', expected: ')'
   {standard input}:1457: Error: found '(', expected: ')'
   {standard input}:1457: Error: non-constant expression in ".if" statement
   {standard input}:1457: Error: junk at end of line, first unrecognized character is `('
   {standard input}:1480: Error: found '(', expected: ')'
   {standard input}:1480: Error: found '(', expected: ')'
   {standard input}:1480: Error: non-constant expression in ".if" statement
   {standard input}:1480: Error: junk at end of line, first unrecognized character is `('
   {standard input}:1591: Error: found '(', expected: ')'
   {standard input}:1591: Error: found '(', expected: ')'
   {standard input}:1591: Error: non-constant expression in ".if" statement
   {standard input}:1591: Error: junk at end of line, first unrecognized character is `('
   {standard input}:1620: Error: found '(', expected: ')'
   {standard input}:1620: Error: found '(', expected: ')'
   {standard input}:1620: Error: non-constant expression in ".if" statement
   {standard input}:1620: Error: junk at end of line, first unrecognized character is `('
   {standard input}:1663: Error: found '(', expected: ')'
   {standard input}:1663: Error: found '(', expected: ')'
   {standard input}:1663: Error: non-constant expression in ".if" statement
   {standard input}:1663: Error: junk at end of line, first unrecognized character is `('
   {standard input}:1722: Error: found '(', expected: ')'
   {standard input}:1722: Error: found '(', expected: ')'
   {standard input}:1722: Error: non-constant expression in ".if" statement
   {standard input}:1722: Error: junk at end of line, first unrecognized character is `('
   {standard input}:1853: Error: found '(', expected: ')'
   {standard input}:1853: Error: found '(', expected: ')'
   {standard input}:1853: Error: non-constant expression in ".if" statement
   {standard input}:1853: Error: junk at end of line, first unrecognized character is `('
   {standard input}:1890: Error: found '(', expected: ')'
   {standard input}:1890: Error: found '(', expected: ')'
   {standard input}:1890: Error: non-constant expression in ".if" statement
   {standard input}:1890: Error: junk at end of line, first unrecognized character is `('
>> {standard input}:1932: Error: found '(', expected: ')'
>> {standard input}:1932: Error: found '(', expected: ')'
>> {standard input}:1932: Error: non-constant expression in ".if" statement
>> {standard input}:1932: Error: junk at end of line, first unrecognized character is `('
   {standard input}:2081: Error: found '(', expected: ')'
   {standard input}:2081: Error: found '(', expected: ')'
   {standard input}:2081: Error: non-constant expression in ".if" statement
   {standard input}:2081: Error: junk at end of line, first unrecognized character is `('
   {standard input}:2343: Error: found '(', expected: ')'
   {standard input}:2343: Error: found '(', expected: ')'
   {standard input}:2343: Error: non-constant expression in ".if" statement
   {standard input}:2343: Error: junk at end of line, first unrecognized character is `('
   {standard input}:2482: Error: found '(', expected: ')'
   {standard input}:2482: Error: found '(', expected: ')'
   {standard input}:2482: Error: non-constant expression in ".if" statement
   {standard input}:2482: Error: junk at end of line, first unrecognized character is `('
   {standard input}:2671: Error: found '(', expected: ')'
   {standard input}:2671: Error: found '(', expected: ')'
   {standard input}:2671: Error: non-constant expression in ".if" statement
   {standard input}:2671: Error: junk at end of line, first unrecognized character is `('
   {standard input}:2730: Error: found '(', expected: ')'
   {standard input}:2730: Error: found '(', expected: ')'
   {standard input}:2730: Error: non-constant expression in ".if" statement
   {standard input}:2730: Error: junk at end of line, first unrecognized character is `('
   {standard input}:2763: Error: found '(', expected: ')'
   {standard input}:2763: Error: found '(', expected: ')'
   {standard input}:2763: Error: non-constant expression in ".if" statement
   {standard input}:2763: Error: junk at end of line, first unrecognized character is `('
   {standard input}:2799: Error: found '(', expected: ')'
   {standard input}:2799: Error: found '(', expected: ')'
   {standard input}:2799: Error: non-constant expression in ".if" statement
   {standard input}:2799: Error: junk at end of line, first unrecognized character is `('
   {standard input}:3260: Error: found '(', expected: ')'
   {standard input}:3260: Error: found '(', expected: ')'
   {standard input}:3260: Error: non-constant expression in ".if" statement
   {standard input}:3260: Error: junk at end of line, first unrecognized character is `('
   {standard input}:3546: Error: found '(', expected: ')'
   {standard input}:3546: Error: found '(', expected: ')'
   {standard input}:3546: Error: non-constant expression in ".if" statement
   {standard input}:3546: Error: junk at end of line, first unrecognized character is `('
   {standard input}:3562: Error: found '(', expected: ')'
   {standard input}:3562: Error: found '(', expected: ')'
   {standard input}:3562: Error: non-constant expression in ".if" statement
   {standard input}:3562: Error: junk at end of line, first unrecognized character is `('
   {standard input}:3592: Error: found '(', expected: ')'
   {standard input}:3592: Error: found '(', expected: ')'
   {standard input}:3592: Error: non-constant expression in ".if" statement
   {standard input}:3592: Error: junk at end of line, first unrecognized character is `('

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