linux-kernel - arch/powerpc/kernel/traps.c:1167:19: error: unused function '__parse

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Date:   Sat, 30 Sep 2023 21:40:29 +0800
From:   kernel test robot <lkp@...el.com>
To:     Christophe Leroy <christophe.leroy@...roup.eu>
Cc:     llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
        linux-kernel@...r.kernel.org,
        Michael Ellerman <mpe@...erman.id.au>,
        Arnd Bergmann <arnd@...db.de>
Subject: arch/powerpc/kernel/traps.c:1167:19: error: unused function
 '__parse_fpscr'

Hi Christophe,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   9f3ebbef746f89f860a90ced99a359202ea86fde
commit: ca13c130a43fe3ab625d22ada0a61e5c0b612229 powerpc/4xx: Remove WatchdogHandler() to fix no previous prototype error
date:   6 weeks ago
config: powerpc-kilauea_defconfig (https://download.01.org/0day-ci/archive/20230930/202309302131.bsuutuxs-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230930/202309302131.bsuutuxs-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202309302131.bsuutuxs-lkp@intel.com/

All errors (new ones prefixed by >>):

>> arch/powerpc/kernel/traps.c:1167:19: error: unused function '__parse_fpscr' [-Werror,-Wunused-function]
    1167 | static inline int __parse_fpscr(unsigned long fpscr)
         |                   ^
   1 error generated.


vim +/__parse_fpscr +1167 arch/powerpc/kernel/traps.c

14cf11af6cf608 Paul Mackerras    2005-09-26  1166  
5fad293bcbd48d Kumar Gala        2007-02-07 @1167  static inline int __parse_fpscr(unsigned long fpscr)
dc1c1ca3dcd94c Stephen Rothwell  2005-10-01  1168  {
aeb1c0f6ff18f5 Eric W. Biederman 2018-04-17  1169  	int ret = FPE_FLTUNK;
dc1c1ca3dcd94c Stephen Rothwell  2005-10-01  1170  
dc1c1ca3dcd94c Stephen Rothwell  2005-10-01  1171  	/* Invalid operation */
dc1c1ca3dcd94c Stephen Rothwell  2005-10-01  1172  	if ((fpscr & FPSCR_VE) && (fpscr & FPSCR_VX))
5fad293bcbd48d Kumar Gala        2007-02-07  1173  		ret = FPE_FLTINV;
dc1c1ca3dcd94c Stephen Rothwell  2005-10-01  1174  
dc1c1ca3dcd94c Stephen Rothwell  2005-10-01  1175  	/* Overflow */
dc1c1ca3dcd94c Stephen Rothwell  2005-10-01  1176  	else if ((fpscr & FPSCR_OE) && (fpscr & FPSCR_OX))
5fad293bcbd48d Kumar Gala        2007-02-07  1177  		ret = FPE_FLTOVF;
dc1c1ca3dcd94c Stephen Rothwell  2005-10-01  1178  
dc1c1ca3dcd94c Stephen Rothwell  2005-10-01  1179  	/* Underflow */
dc1c1ca3dcd94c Stephen Rothwell  2005-10-01  1180  	else if ((fpscr & FPSCR_UE) && (fpscr & FPSCR_UX))
5fad293bcbd48d Kumar Gala        2007-02-07  1181  		ret = FPE_FLTUND;
dc1c1ca3dcd94c Stephen Rothwell  2005-10-01  1182  
dc1c1ca3dcd94c Stephen Rothwell  2005-10-01  1183  	/* Divide by zero */
dc1c1ca3dcd94c Stephen Rothwell  2005-10-01  1184  	else if ((fpscr & FPSCR_ZE) && (fpscr & FPSCR_ZX))
5fad293bcbd48d Kumar Gala        2007-02-07  1185  		ret = FPE_FLTDIV;
dc1c1ca3dcd94c Stephen Rothwell  2005-10-01  1186  
dc1c1ca3dcd94c Stephen Rothwell  2005-10-01  1187  	/* Inexact result */
dc1c1ca3dcd94c Stephen Rothwell  2005-10-01  1188  	else if ((fpscr & FPSCR_XE) && (fpscr & FPSCR_XX))
5fad293bcbd48d Kumar Gala        2007-02-07  1189  		ret = FPE_FLTRES;
5fad293bcbd48d Kumar Gala        2007-02-07  1190  
5fad293bcbd48d Kumar Gala        2007-02-07  1191  	return ret;
5fad293bcbd48d Kumar Gala        2007-02-07  1192  }
5fad293bcbd48d Kumar Gala        2007-02-07  1193  

:::::: The code at line 1167 was first introduced by commit
:::::: 5fad293bcbd48d9a2370020cf60e4b4a42559b12 [POWERPC] Fixup error handling when emulating a floating point instruction

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

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki