arch/xtensa/lib/umulsidi3.S:18:7: warning: "XCHAL_NO_MUL" is not defined, evaluates to 0

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   9fdfb15a3dbf818e06be514f4abbfc071004cbe7
commit: 8939c58d68f97ce530f02d46c9f2b56c3ec88399 xtensa: add __umulsidi3 helper
date:   9 months ago
config: xtensa-randconfig-001-20230914 (https://download.01.org/0day-ci/archive/20230915/202309150556.t0yCdv3g-lkp@xxxxxxxxx/config)
compiler: xtensa-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230915/202309150556.t0yCdv3g-lkp@xxxxxxxxx/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202309150556.t0yCdv3g-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

>> arch/xtensa/lib/umulsidi3.S:18:7: warning: "XCHAL_NO_MUL" is not defined, evaluates to 0 [-Wundef]
      18 | #elif XCHAL_NO_MUL
         |       ^~~~~~~~~~~~
   arch/xtensa/lib/umulsidi3.S:159:5: warning: "XCHAL_NO_MUL" is not defined, evaluates to 0 [-Wundef]
     159 | #if XCHAL_NO_MUL
         |     ^~~~~~~~~~~~


vim +/XCHAL_NO_MUL +18 arch/xtensa/lib/umulsidi3.S

    11	
    12	#ifdef __XTENSA_CALL0_ABI__
    13		abi_entry(32)
    14		s32i	a12, sp, 16
    15		s32i	a13, sp, 20
    16		s32i	a14, sp, 24
    17		s32i	a15, sp, 28
  > 18	#elif XCHAL_NO_MUL
    19		/* This is not really a leaf function; allocate enough stack space
    20		   to allow CALL12s to a helper function.  */
    21		abi_entry(32)
    22	#else
    23		abi_entry_default
    24	#endif
    25	

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