arch/arm/kernel/irq.c:51:12: sparse: sparse: symbol '__pcpu_scope_irq_stack_ptr' was not declared. Should it be static?

[kernel test robot <lkp@intel.com>]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   d888c83fcec75194a8a48ccd283953bdba7b2550
commit: cafc0eab168917ec9c0cd47d530a40cd40eb2928 ARM: v7m: enable support for IRQ stacks
date:   4 months ago
config: arm-randconfig-s031-20220327 (https://download.01.org/0day-ci/archive/20220331/202203310200.MFNPVX0L-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 11.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.4-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cafc0eab168917ec9c0cd47d530a40cd40eb2928
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout cafc0eab168917ec9c0cd47d530a40cd40eb2928
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=arm SHELL=/bin/bash arch/arm/kernel/

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


sparse warnings: (new ones prefixed by >>)
>> arch/arm/kernel/irq.c:51:12: sparse: sparse: symbol '__pcpu_scope_irq_stack_ptr' was not declared. Should it be static?

vim +/__pcpu_scope_irq_stack_ptr +51 arch/arm/kernel/irq.c

d4664b6c987f803 Ard Biesheuvel 2021-10-05  50  
d4664b6c987f803 Ard Biesheuvel 2021-10-05 @51  asmlinkage DEFINE_PER_CPU_READ_MOSTLY(u8 *, irq_stack_ptr);
d4664b6c987f803 Ard Biesheuvel 2021-10-05  52  

:::::: The code at line 51 was first introduced by commit
:::::: d4664b6c987f80338407889c1e3f3abe7e16be94 ARM: implement IRQ stacks

:::::: TO: Ard Biesheuvel <ardb@kernel.org>
:::::: CC: Ard Biesheuvel <ardb@kernel.org>

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