[linux-next:master 7639/10701] arch/arm64/kernel/efi.c:88:21: sparse: sparse: cast to non-scalar

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

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   fb57b1fabcb28f358901b2df90abd2b48abc1ca8
commit: 7b364f0949ae2dd205d5e9afa4b82ee17030d928 [7639/10701] READ_ONCE: Drop pointer qualifiers when reading from scalar types
config: arm64-randconfig-s001-20200520 (attached as .config)
compiler: aarch64-linux-gcc (GCC) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.1-193-gb8fad4bc-dirty
        git checkout 7b364f0949ae2dd205d5e9afa4b82ee17030d928
        # save the attached .config to linux build tree
        make W=1 C=1 ARCH=arm64 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__'

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


sparse warnings: (new ones prefixed by >>)

>> arch/arm64/kernel/efi.c:88:21: sparse: sparse: cast to non-scalar
>> arch/arm64/kernel/efi.c:88:21: sparse: sparse: cast from non-scalar
--
>> arch/arm64/mm/kasan_init.c:63:13: sparse: sparse: cast to non-scalar
>> arch/arm64/mm/kasan_init.c:63:13: sparse: sparse: cast from non-scalar
   arch/arm64/mm/kasan_init.c:71:24: sparse: sparse: cast to non-scalar
   arch/arm64/mm/kasan_init.c:71:24: sparse: sparse: cast from non-scalar
   arch/arm64/mm/kasan_init.c:70:24: sparse: sparse: cast to non-scalar
   arch/arm64/mm/kasan_init.c:70:24: sparse: sparse: cast from non-scalar
   arch/arm64/mm/kasan_init.c:77:13: sparse: sparse: cast to non-scalar
   arch/arm64/mm/kasan_init.c:77:13: sparse: sparse: cast from non-scalar
   arch/arm64/mm/kasan_init.c:84:54: sparse: sparse: cast to non-scalar
   arch/arm64/mm/kasan_init.c:84:54: sparse: sparse: cast from non-scalar
   arch/arm64/mm/kasan_init.c:84:24: sparse: sparse: cast to non-scalar
   arch/arm64/mm/kasan_init.c:84:24: sparse: sparse: cast from non-scalar
   arch/arm64/mm/kasan_init.c:90:22: sparse: sparse: cast to non-scalar
   arch/arm64/mm/kasan_init.c:90:22: sparse: sparse: cast from non-scalar
   arch/arm64/mm/kasan_init.c:114:54: sparse: sparse: cast to non-scalar
   arch/arm64/mm/kasan_init.c:114:54: sparse: sparse: cast from non-scalar
   arch/arm64/mm/kasan_init.c:126:54: sparse: sparse: cast to non-scalar
   arch/arm64/mm/kasan_init.c:126:54: sparse: sparse: cast from non-scalar
   arch/arm64/mm/kasan_init.c:138:54: sparse: sparse: cast to non-scalar
   arch/arm64/mm/kasan_init.c:138:54: sparse: sparse: cast from non-scalar
   arch/arm64/mm/kasan_init.c:184:17: sparse: sparse: cast to non-scalar
   arch/arm64/mm/kasan_init.c:184:17: sparse: sparse: cast from non-scalar

vim +88 arch/arm64/kernel/efi.c

f7d924894265794 Ard Biesheuvel    2015-11-30  84  
8b1e0f81fb6fcf3 Anshuman Khandual 2019-07-11  85  static int __init set_permissions(pte_t *ptep, unsigned long addr, void *data)
bd264d046aad25e Ard Biesheuvel    2016-06-29  86  {
bd264d046aad25e Ard Biesheuvel    2016-06-29  87  	efi_memory_desc_t *md = data;
20a004e7b017cce Will Deacon       2018-02-15 @88  	pte_t pte = READ_ONCE(*ptep);
bd264d046aad25e Ard Biesheuvel    2016-06-29  89  
bd264d046aad25e Ard Biesheuvel    2016-06-29  90  	if (md->attribute & EFI_MEMORY_RO)
bd264d046aad25e Ard Biesheuvel    2016-06-29  91  		pte = set_pte_bit(pte, __pgprot(PTE_RDONLY));
bd264d046aad25e Ard Biesheuvel    2016-06-29  92  	if (md->attribute & EFI_MEMORY_XP)
bd264d046aad25e Ard Biesheuvel    2016-06-29  93  		pte = set_pte_bit(pte, __pgprot(PTE_PXN));
bd264d046aad25e Ard Biesheuvel    2016-06-29  94  	set_pte(ptep, pte);
bd264d046aad25e Ard Biesheuvel    2016-06-29  95  	return 0;
bd264d046aad25e Ard Biesheuvel    2016-06-29  96  }
bd264d046aad25e Ard Biesheuvel    2016-06-29  97  

:::::: The code at line 88 was first introduced by commit
:::::: 20a004e7b017cce282a46ac5d02c2b9c6b9bb1fa arm64: mm: Use READ_ONCE/WRITE_ONCE when accessing page tables

:::::: TO: Will Deacon <will.deacon@arm.com>
:::::: CC: Catalin Marinas <catalin.marinas@arm.com>

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

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