arch/powerpc/math-emu/fcmpu.c:15:2: error: variable '_fex' set but not used

arch/powerpc/math-emu/fcmpu.c:15:2: error: variable '_fex' set but not used

[kernel test robot]

Hi Christophe,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   e55e5df193d247a38a5e1ac65a5316a0adcc22fa
commit: 7245fc5bb7a966852d5bd7779d1f5855530b461a powerpc/math-emu: Remove -w build flag and fix warnings
date:   10 months ago
config: powerpc-randconfig-r022-20230630 (https://download.01.org/0day-ci/archive/20230630/202306301631.cFuy7ZmI-lkp@intel.com/config)
compiler: clang version 15.0.7 (https://github.com/llvm/llvm-project.git 8dfdcc7b7bf66834a761bd8de445840ef68e4d1a)
reproduce: (https://download.01.org/0day-ci/archive/20230630/202306301631.cFuy7ZmI-lkp@intel.com/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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202306301631.cFuy7ZmI-lkp@intel.com/

All errors (new ones prefixed by >>):

>> arch/powerpc/math-emu/fcmpu.c:15:2: error: variable '_fex' set but not used [-Werror,-Wunused-but-set-variable]
           FP_DECL_EX;
           ^
   include/math-emu/soft-fp.h:94:24: note: expanded from macro 'FP_DECL_EX'
   #define FP_DECL_EX int _fex = 0
                          ^
>> arch/powerpc/math-emu/fcmpu.c:13:2: error: variable 'A_c' set but not used [-Werror,-Wunused-but-set-variable]
           FP_DECL_D(A);
           ^
   include/math-emu/double.h:73:23: note: expanded from macro 'FP_DECL_D'
   #define FP_DECL_D(X)            _FP_DECL(2,X)
                                   ^
   include/math-emu/op-common.h:28:14: note: expanded from macro '_FP_DECL'
     _FP_I_TYPE X##_c=0, X##_s=0, X##_e=0; \
                ^
   <scratch space>:161:1: note: expanded from here
   A_c
   ^
>> arch/powerpc/math-emu/fcmpu.c:14:2: error: variable 'B_c' set but not used [-Werror,-Wunused-but-set-variable]
           FP_DECL_D(B);
           ^
   include/math-emu/double.h:73:23: note: expanded from macro 'FP_DECL_D'
   #define FP_DECL_D(X)            _FP_DECL(2,X)
                                   ^
   include/math-emu/op-common.h:28:14: note: expanded from macro '_FP_DECL'
     _FP_I_TYPE X##_c=0, X##_s=0, X##_e=0; \
                ^
   <scratch space>:167:1: note: expanded from here
   B_c
   ^
   arch/powerpc/math-emu/fcmpu.c:11:1: error: no previous prototype for function 'fcmpu' [-Werror,-Wmissing-prototypes]
   fcmpu(u32 *ccr, int crfD, void *frA, void *frB)
   ^
   arch/powerpc/math-emu/fcmpu.c:10:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int
   ^
   static 
   4 errors generated.
--
>> arch/powerpc/math-emu/fsel.c:14:2: error: variable '_fex' set but not used [-Werror,-Wunused-but-set-variable]
           FP_DECL_EX;
           ^
   include/math-emu/soft-fp.h:94:24: note: expanded from macro 'FP_DECL_EX'
   #define FP_DECL_EX int _fex = 0
                          ^
   arch/powerpc/math-emu/fsel.c:11:1: error: no previous prototype for function 'fsel' [-Werror,-Wmissing-prototypes]
   fsel(u32 *frD, void *frA, u32 *frB, u32 *frC)
   ^
   arch/powerpc/math-emu/fsel.c:10:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int
   ^
   static 
   2 errors generated.
--
>> arch/powerpc/math-emu/fctiwz.c:14:2: error: variable '_fex' set but not used [-Werror,-Wunused-but-set-variable]
           FP_DECL_EX;
           ^
   include/math-emu/soft-fp.h:94:24: note: expanded from macro 'FP_DECL_EX'
   #define FP_DECL_EX int _fex = 0
                          ^
   arch/powerpc/math-emu/fctiwz.c:11:1: error: no previous prototype for function 'fctiwz' [-Werror,-Wmissing-prototypes]
   fctiwz(u32 *frD, void *frB)
   ^
   arch/powerpc/math-emu/fctiwz.c:10:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int
   ^
   static 
   2 errors generated.
--
>> arch/powerpc/math-emu/fctiw.c:14:2: error: variable '_fex' set but not used [-Werror,-Wunused-but-set-variable]
           FP_DECL_EX;
           ^
   include/math-emu/soft-fp.h:94:24: note: expanded from macro 'FP_DECL_EX'
   #define FP_DECL_EX int _fex = 0
                          ^
   arch/powerpc/math-emu/fctiw.c:11:1: error: no previous prototype for function 'fctiw' [-Werror,-Wmissing-prototypes]
   fctiw(u32 *frD, void *frB)
   ^
   arch/powerpc/math-emu/fctiw.c:10:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int
   ^
   static 
   2 errors generated.


vim +/_fex +15 arch/powerpc/math-emu/fcmpu.c

^1da177e4c3f41 arch/ppc/math-emu/fcmpu.c     Linus Torvalds 2005-04-16   9  
^1da177e4c3f41 arch/ppc/math-emu/fcmpu.c     Linus Torvalds 2005-04-16  10  int
^1da177e4c3f41 arch/ppc/math-emu/fcmpu.c     Linus Torvalds 2005-04-16  11  fcmpu(u32 *ccr, int crfD, void *frA, void *frB)
^1da177e4c3f41 arch/ppc/math-emu/fcmpu.c     Linus Torvalds 2005-04-16  12  {
^1da177e4c3f41 arch/ppc/math-emu/fcmpu.c     Linus Torvalds 2005-04-16 @13  	FP_DECL_D(A);
^1da177e4c3f41 arch/ppc/math-emu/fcmpu.c     Linus Torvalds 2005-04-16 @14  	FP_DECL_D(B);
d2b194ed820880 arch/powerpc/math-emu/fcmpu.c Kumar Gala     2008-06-04 @15  	FP_DECL_EX;
^1da177e4c3f41 arch/ppc/math-emu/fcmpu.c     Linus Torvalds 2005-04-16  16  	int code[4] = { (1 << 3), (1 << 1), (1 << 2), (1 << 0) };
^1da177e4c3f41 arch/ppc/math-emu/fcmpu.c     Linus Torvalds 2005-04-16  17  	long cmp;
^1da177e4c3f41 arch/ppc/math-emu/fcmpu.c     Linus Torvalds 2005-04-16  18  

:::::: The code at line 15 was first introduced by commit
:::::: d2b194ed820880eb19c43b9c10d9f5f30026ee54 powerpc/math-emu: Use kernel generic math-emu code

:::::: TO: Kumar Gala <galak@kernel.crashing.org>
:::::: CC: Kumar Gala <galak@kernel.crashing.org>

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