linux-kernel - [ardb:efi-psci 2/2] drivers/firmware/psci/psci.c:158:9: error: implicit declaration of function 'efi_set

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Date:   Mon, 21 Mar 2022 16:39:01 +0800
From:   kernel test robot <lkp@...el.com>
To:     Ard Biesheuvel <ardb@...nel.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [ardb:efi-psci 2/2] drivers/firmware/psci/psci.c:158:9: error:
 implicit declaration of function 'efi_set_pgd'

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git efi-psci
head:   4b8d4b95fbd43459a4b0ae3f9020a912f7621884
commit: 4b8d4b95fbd43459a4b0ae3f9020a912f7621884 [2/2] efi: arm: implement PSCI method backed by EFI runtime code
config: arm-allmodconfig (https://download.01.org/0day-ci/archive/20220321/202203211626.cYFXbogy-lkp@intel.com/config)
compiler: arm-linux-gnueabi-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/ardb/linux.git/commit/?id=4b8d4b95fbd43459a4b0ae3f9020a912f7621884
        git remote add ardb git://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git
        git fetch --no-tags ardb efi-psci
        git checkout 4b8d4b95fbd43459a4b0ae3f9020a912f7621884
        # 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=arm SHELL=/bin/bash

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 >>):

   drivers/firmware/psci/psci.c: In function '__invoke_psci_fn_efi':
>> drivers/firmware/psci/psci.c:158:9: error: implicit declaration of function 'efi_set_pgd' [-Werror=implicit-function-declaration]
     158 |         efi_set_pgd(&efi_mm);
         |         ^~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/efi_set_pgd +158 drivers/firmware/psci/psci.c

   131	
   132	static unsigned long __invoke_psci_fn_efi(unsigned long function_id,
   133				unsigned long arg0, unsigned long arg1,
   134				unsigned long arg2)
   135	{
   136		unsigned long flags, ret;
   137	
   138		switch (function_id) {
   139		case PSCI_0_2_FN_PSCI_VERSION:
   140			return PSCI_VERSION(0, 2);
   141		case PSCI_0_2_FN_MIGRATE_INFO_TYPE:
   142			return PSCI_0_2_TOS_MP;
   143		case PSCI_0_2_FN_CPU_SUSPEND:
   144		case PSCI_0_2_FN_CPU_OFF:
   145		case PSCI_0_2_FN_CPU_ON:
   146		case PSCI_0_2_FN_AFFINITY_INFO:
   147		case PSCI_0_2_FN64_CPU_SUSPEND:
   148		case PSCI_0_2_FN64_CPU_ON:
   149		case PSCI_0_2_FN64_AFFINITY_INFO:
   150			if (WARN_ON_ONCE(!efi_psci.psci_handler ||
   151					 !efi_enabled(EFI_RUNTIME_SERVICES)))
   152		default:
   153				return PSCI_RET_NOT_SUPPORTED;
   154			break;
   155		}
   156	
   157		raw_local_irq_save(flags);
 > 158		efi_set_pgd(&efi_mm);
   159	
   160		ret = efi_psci.psci_handler(function_id, arg0, arg1, arg2);
   161	
   162		efi_set_pgd(current->active_mm);
   163		raw_local_irq_restore(flags);
   164	
   165		return ret;
   166	}
   167	

-- 
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