linux-kernel - arch/powerpc/kernel/traps.c:1160:19: error: unused function '__parse

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Message-ID: <202102181517.oO03y0Qd-lkp@intel.com>
Date:   Thu, 18 Feb 2021 15:30:23 +0800
From:   kernel test robot <lkp@...el.com>
To:     Christophe Leroy <christophe.leroy@...roup.eu>
Cc:     kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
        linux-kernel@...r.kernel.org, Michael Ellerman <mpe@...erman.id.au>
Subject: arch/powerpc/kernel/traps.c:1160:19: error: unused function
 '__parse_fpscr'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   f40ddce88593482919761f74910f42f4b84c004b
commit: 7d68c89169508064c460a1208f38ed0589d226fa powerpc/32s: Allow deselecting CONFIG_PPC_FPU on mpc832x
date:   3 months ago
config: powerpc-randconfig-r026-20210218 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project c9439ca36342fb6013187d0a69aef92736951476)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install powerpc cross compiling tool for clang build
        # apt-get install binutils-powerpc-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7d68c89169508064c460a1208f38ed0589d226fa
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 7d68c89169508064c460a1208f38ed0589d226fa
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

>> arch/powerpc/kernel/traps.c:1160:19: error: unused function '__parse_fpscr' [-Werror,-Wunused-function]
   static inline int __parse_fpscr(unsigned long fpscr)
                     ^
   1 error generated.

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for LEDS_TRIGGER_DISK
   Depends on NEW_LEDS && LEDS_TRIGGERS && (IDE_GD_ATA || ATA
   Selected by
   - ADB_PMU_LED_DISK && MACINTOSH_DRIVERS && ADB_PMU_LED && LEDS_CLASS


vim +/__parse_fpscr +1160 arch/powerpc/kernel/traps.c

14cf11af6cf608 Paul Mackerras    2005-09-26  1159  
5fad293bcbd48d Kumar Gala        2007-02-07 @1160  static inline int __parse_fpscr(unsigned long fpscr)
dc1c1ca3dcd94c Stephen Rothwell  2005-10-01  1161  {
aeb1c0f6ff18f5 Eric W. Biederman 2018-04-17  1162  	int ret = FPE_FLTUNK;
dc1c1ca3dcd94c Stephen Rothwell  2005-10-01  1163  
dc1c1ca3dcd94c Stephen Rothwell  2005-10-01  1164  	/* Invalid operation */
dc1c1ca3dcd94c Stephen Rothwell  2005-10-01  1165  	if ((fpscr & FPSCR_VE) && (fpscr & FPSCR_VX))
5fad293bcbd48d Kumar Gala        2007-02-07  1166  		ret = FPE_FLTINV;
dc1c1ca3dcd94c Stephen Rothwell  2005-10-01  1167  
dc1c1ca3dcd94c Stephen Rothwell  2005-10-01  1168  	/* Overflow */
dc1c1ca3dcd94c Stephen Rothwell  2005-10-01  1169  	else if ((fpscr & FPSCR_OE) && (fpscr & FPSCR_OX))
5fad293bcbd48d Kumar Gala        2007-02-07  1170  		ret = FPE_FLTOVF;
dc1c1ca3dcd94c Stephen Rothwell  2005-10-01  1171  
dc1c1ca3dcd94c Stephen Rothwell  2005-10-01  1172  	/* Underflow */
dc1c1ca3dcd94c Stephen Rothwell  2005-10-01  1173  	else if ((fpscr & FPSCR_UE) && (fpscr & FPSCR_UX))
5fad293bcbd48d Kumar Gala        2007-02-07  1174  		ret = FPE_FLTUND;
dc1c1ca3dcd94c Stephen Rothwell  2005-10-01  1175  
dc1c1ca3dcd94c Stephen Rothwell  2005-10-01  1176  	/* Divide by zero */
dc1c1ca3dcd94c Stephen Rothwell  2005-10-01  1177  	else if ((fpscr & FPSCR_ZE) && (fpscr & FPSCR_ZX))
5fad293bcbd48d Kumar Gala        2007-02-07  1178  		ret = FPE_FLTDIV;
dc1c1ca3dcd94c Stephen Rothwell  2005-10-01  1179  
dc1c1ca3dcd94c Stephen Rothwell  2005-10-01  1180  	/* Inexact result */
dc1c1ca3dcd94c Stephen Rothwell  2005-10-01  1181  	else if ((fpscr & FPSCR_XE) && (fpscr & FPSCR_XX))
5fad293bcbd48d Kumar Gala        2007-02-07  1182  		ret = FPE_FLTRES;
5fad293bcbd48d Kumar Gala        2007-02-07  1183  
5fad293bcbd48d Kumar Gala        2007-02-07  1184  	return ret;
5fad293bcbd48d Kumar Gala        2007-02-07  1185  }
5fad293bcbd48d Kumar Gala        2007-02-07  1186  

:::::: The code at line 1160 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, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

Download attachment ".config.gz" of type "application/gzip" (38582 bytes)