linux-kernel - arch/arm64/kvm/hyp/vhe/switch.c:217:17: warning: no previous prototype for 'hyp

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Date:   Sat, 1 Jan 2022 12:39:04 +0800
From:   kernel test robot <lkp@...el.com>
To:     Andrew Scull <ascull@...gle.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Marc Zyngier <maz@...nel.org>
Subject: arch/arm64/kvm/hyp/vhe/switch.c:217:17: warning: no previous
 prototype for 'hyp_panic'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   8008293888188c3923f5bd8a69370dae25ed14e5
commit: f79e616f27ab6cd74deb0995a8eead3d1c9d65af KVM: arm64: Use BUG and BUG_ON in nVHE hyp
date:   9 months ago
config: arm64-randconfig-r035-20211231 (https://download.01.org/0day-ci/archive/20220101/202201011207.T9q6Uy0y-lkp@intel.com/config)
compiler: aarch64-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=f79e616f27ab6cd74deb0995a8eead3d1c9d65af
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout f79e616f27ab6cd74deb0995a8eead3d1c9d65af
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arm64 SHELL=/bin/bash arch/arm64/kvm/ drivers/edac/

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/arm64/kvm/hyp/vhe/switch.c:217:17: warning: no previous prototype for 'hyp_panic' [-Wmissing-prototypes]
     217 | void __noreturn hyp_panic(void)
         |                 ^~~~~~~~~
   arch/arm64/kvm/hyp/vhe/switch.c:227:17: warning: no previous prototype for 'kvm_unexpected_el2_exception' [-Wmissing-prototypes]
     227 | asmlinkage void kvm_unexpected_el2_exception(void)
         |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
--
>> arch/arm64/kvm/hyp/nvhe/switch.c:264:17: warning: no previous prototype for 'hyp_panic' [-Wmissing-prototypes]
     264 | void __noreturn hyp_panic(void)
         |                 ^~~~~~~~~
   arch/arm64/kvm/hyp/nvhe/switch.c:286:17: warning: no previous prototype for 'kvm_unexpected_el2_exception' [-Wmissing-prototypes]
     286 | asmlinkage void kvm_unexpected_el2_exception(void)
         |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/hyp_panic +217 arch/arm64/kvm/hyp/vhe/switch.c

09cf57eba30424 David Brazdil 2020-06-25  216  
6a0259ed29bba8 Andrew Scull  2020-09-15 @217  void __noreturn hyp_panic(void)
09cf57eba30424 David Brazdil 2020-06-25  218  {
09cf57eba30424 David Brazdil 2020-06-25  219  	u64 spsr = read_sysreg_el2(SYS_SPSR);
09cf57eba30424 David Brazdil 2020-06-25  220  	u64 elr = read_sysreg_el2(SYS_ELR);
96d389ca10110d Rob Herring   2020-10-28  221  	u64 par = read_sysreg_par();
09cf57eba30424 David Brazdil 2020-06-25  222  
6a0259ed29bba8 Andrew Scull  2020-09-15  223  	__hyp_call_panic(spsr, elr, par);
09cf57eba30424 David Brazdil 2020-06-25  224  	unreachable();
09cf57eba30424 David Brazdil 2020-06-25  225  }
e9ee186bb735bf James Morse   2020-08-21  226  

:::::: The code at line 217 was first introduced by commit
:::::: 6a0259ed29bba83653a36fabcdf6b06aecd78596 KVM: arm64: Remove hyp_panic arguments

:::::: TO: Andrew Scull <ascull@...gle.com>
:::::: CC: Marc Zyngier <maz@...nel.org>

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