linux-kernel - arch/sh/kernel/traps_32.c:565:5: warning: no previous prototype for 'is_dsp

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Message-ID: <202111170656.KplzrkYk-lkp@intel.com>
Date:   Wed, 17 Nov 2021 06:01:09 +0800
From:   kernel test robot <lkp@...el.com>
To:     Christoph Hellwig <hch@....de>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Rich Felker <dalias@...c.org>
Subject: arch/sh/kernel/traps_32.c:565:5: warning: no previous prototype for
 'is_dsp_inst'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   8ab774587903771821b59471cc723bba6d893942
commit: ccbb5239d495923cb24b84a73eb814626c5bfa57 sh: remove -Werror from Makefiles
date:   1 year, 3 months ago
config: sh-randconfig-r031-20211116 (attached as .config)
compiler: sh4-linux-gcc (GCC) 11.2.0
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
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ccbb5239d495923cb24b84a73eb814626c5bfa57
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout ccbb5239d495923cb24b84a73eb814626c5bfa57
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=sh 

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

All warnings (new ones prefixed by >>):

>> arch/sh/kernel/traps_32.c:565:5: warning: no previous prototype for 'is_dsp_inst' [-Wmissing-prototypes]
     565 | int is_dsp_inst(struct pt_regs *regs)
         |     ^~~~~~~~~~~
   arch/sh/kernel/traps_32.c:729:6: warning: no previous prototype for 'per_cpu_trap_init' [-Wmissing-prototypes]
     729 | void per_cpu_trap_init(void)
         |      ^~~~~~~~~~~~~~~~~


vim +/is_dsp_inst +565 arch/sh/kernel/traps_32.c

^1da177e4c3f41 arch/sh/kernel/traps.c Linus Torvalds 2005-04-16  560  
^1da177e4c3f41 arch/sh/kernel/traps.c Linus Torvalds 2005-04-16  561  #ifdef CONFIG_SH_DSP
^1da177e4c3f41 arch/sh/kernel/traps.c Linus Torvalds 2005-04-16  562  /*
^1da177e4c3f41 arch/sh/kernel/traps.c Linus Torvalds 2005-04-16  563   *	SH-DSP support gerg@...pgear.com.
^1da177e4c3f41 arch/sh/kernel/traps.c Linus Torvalds 2005-04-16  564   */
^1da177e4c3f41 arch/sh/kernel/traps.c Linus Torvalds 2005-04-16 @565  int is_dsp_inst(struct pt_regs *regs)
^1da177e4c3f41 arch/sh/kernel/traps.c Linus Torvalds 2005-04-16  566  {
882c12c4e1a95e arch/sh/kernel/traps.c Paul Mundt     2007-05-14  567  	unsigned short inst = 0;
^1da177e4c3f41 arch/sh/kernel/traps.c Linus Torvalds 2005-04-16  568  
^1da177e4c3f41 arch/sh/kernel/traps.c Linus Torvalds 2005-04-16  569  	/*
^1da177e4c3f41 arch/sh/kernel/traps.c Linus Torvalds 2005-04-16  570  	 * Safe guard if DSP mode is already enabled or we're lacking
^1da177e4c3f41 arch/sh/kernel/traps.c Linus Torvalds 2005-04-16  571  	 * the DSP altogether.
^1da177e4c3f41 arch/sh/kernel/traps.c Linus Torvalds 2005-04-16  572  	 */
11c1965687b0a4 arch/sh/kernel/traps.c Paul Mundt     2006-12-25  573  	if (!(current_cpu_data.flags & CPU_HAS_DSP) || (regs->sr & SR_DSP))
^1da177e4c3f41 arch/sh/kernel/traps.c Linus Torvalds 2005-04-16  574  		return 0;
^1da177e4c3f41 arch/sh/kernel/traps.c Linus Torvalds 2005-04-16  575  
^1da177e4c3f41 arch/sh/kernel/traps.c Linus Torvalds 2005-04-16  576  	get_user(inst, ((unsigned short *) regs->pc));
^1da177e4c3f41 arch/sh/kernel/traps.c Linus Torvalds 2005-04-16  577  
^1da177e4c3f41 arch/sh/kernel/traps.c Linus Torvalds 2005-04-16  578  	inst &= 0xf000;
^1da177e4c3f41 arch/sh/kernel/traps.c Linus Torvalds 2005-04-16  579  
^1da177e4c3f41 arch/sh/kernel/traps.c Linus Torvalds 2005-04-16  580  	/* Check for any type of DSP or support instruction */
^1da177e4c3f41 arch/sh/kernel/traps.c Linus Torvalds 2005-04-16  581  	if ((inst == 0xf000) || (inst == 0x4000))
^1da177e4c3f41 arch/sh/kernel/traps.c Linus Torvalds 2005-04-16  582  		return 1;
^1da177e4c3f41 arch/sh/kernel/traps.c Linus Torvalds 2005-04-16  583  
^1da177e4c3f41 arch/sh/kernel/traps.c Linus Torvalds 2005-04-16  584  	return 0;
^1da177e4c3f41 arch/sh/kernel/traps.c Linus Torvalds 2005-04-16  585  }
^1da177e4c3f41 arch/sh/kernel/traps.c Linus Torvalds 2005-04-16  586  #else
^1da177e4c3f41 arch/sh/kernel/traps.c Linus Torvalds 2005-04-16  587  #define is_dsp_inst(regs)	(0)
^1da177e4c3f41 arch/sh/kernel/traps.c Linus Torvalds 2005-04-16  588  #endif /* CONFIG_SH_DSP */
^1da177e4c3f41 arch/sh/kernel/traps.c Linus Torvalds 2005-04-16  589  

:::::: The code at line 565 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2

:::::: TO: Linus Torvalds <torvalds@...970.osdl.org>
:::::: CC: Linus Torvalds <torvalds@...970.osdl.org>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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