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* [linux-next:master 7520/15793] arch/arm64/kernel/hibernate.c:192:22: sparse: sparse: cast to non-scalar
@ 2020-06-07 10:24 kernel test robot
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From: kernel test robot @ 2020-06-07 10:24 UTC (permalink / raw)
  To: kbuild-all

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   af30725c132e2e5c5369b60369ff0771fde7d4ff
commit: 7b364f0949ae2dd205d5e9afa4b82ee17030d928 [7520/15793] READ_ONCE: Drop pointer qualifiers when reading from scalar types
config: arm64-randconfig-s032-20200607 (attached as .config)
compiler: aarch64-linux-gcc (GCC) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.1-247-gcadbd124-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: kernel test robot <lkp@intel.com>


sparse warnings: (new ones prefixed by >>)

>> arch/arm64/kernel/hibernate.c:192:22: sparse: sparse: cast to non-scalar
>> arch/arm64/kernel/hibernate.c:192:22: sparse: sparse: cast from non-scalar
   arch/arm64/kernel/hibernate.c:200:13: sparse: sparse: cast to non-scalar
   arch/arm64/kernel/hibernate.c:200:13: sparse: sparse: cast from non-scalar
   arch/arm64/kernel/hibernate.c:207:16: sparse: sparse: cast to non-scalar
   arch/arm64/kernel/hibernate.c:207:16: sparse: sparse: cast from non-scalar
   arch/arm64/kernel/hibernate.c:208:13: sparse: sparse: cast to non-scalar
   arch/arm64/kernel/hibernate.c:208:13: sparse: sparse: cast from non-scalar
   arch/arm64/kernel/hibernate.c:215:16: sparse: sparse: cast to non-scalar
   arch/arm64/kernel/hibernate.c:215:16: sparse: sparse: cast from non-scalar
   arch/arm64/kernel/hibernate.c:341:21: sparse: sparse: cast to non-scalar
   arch/arm64/kernel/hibernate.c:341:21: sparse: sparse: cast from non-scalar
   arch/arm64/kernel/hibernate.c:377:20: sparse: sparse: cast to non-scalar
   arch/arm64/kernel/hibernate.c:377:20: sparse: sparse: cast from non-scalar
   arch/arm64/kernel/hibernate.c:379:20: sparse: sparse: cast to non-scalar
   arch/arm64/kernel/hibernate.c:379:20: sparse: sparse: cast from non-scalar
   arch/arm64/kernel/hibernate.c:395:13: sparse: sparse: cast to non-scalar
   arch/arm64/kernel/hibernate.c:395:13: sparse: sparse: cast from non-scalar
   arch/arm64/kernel/hibernate.c:401:20: sparse: sparse: cast to non-scalar
   arch/arm64/kernel/hibernate.c:401:20: sparse: sparse: cast from non-scalar
   arch/arm64/kernel/hibernate.c:403:20: sparse: sparse: cast to non-scalar
   arch/arm64/kernel/hibernate.c:403:20: sparse: sparse: cast from non-scalar
   arch/arm64/kernel/hibernate.c:405:29: sparse: sparse: cast to non-scalar
   arch/arm64/kernel/hibernate.c:405:29: sparse: sparse: cast from non-scalar
   arch/arm64/kernel/hibernate.c:430:22: sparse: sparse: cast to non-scalar
   arch/arm64/kernel/hibernate.c:430:22: sparse: sparse: cast from non-scalar
   arch/arm64/kernel/hibernate.c:440:29: sparse: sparse: cast to non-scalar
   arch/arm64/kernel/hibernate.c:440:29: sparse: sparse: cast from non-scalar
   arch/arm64/kernel/hibernate.c:467:30: sparse: sparse: cast to non-scalar
   arch/arm64/kernel/hibernate.c:467:30: sparse: sparse: cast from non-scalar
--
   arch/arm64/kvm/../../../virt/kvm/arm/mmu.c:180:28: sparse: sparse: cast to non-scalar
   arch/arm64/kvm/../../../virt/kvm/arm/mmu.c:180:28: sparse: sparse: cast from non-scalar
   arch/arm64/kvm/../../../virt/kvm/arm/mmu.c:247:27: sparse: sparse: cast to non-scalar
   arch/arm64/kvm/../../../virt/kvm/arm/mmu.c:247:27: sparse: sparse: cast from non-scalar
   arch/arm64/kvm/../../../virt/kvm/arm/mmu.c:369:15: sparse: sparse: cast to non-scalar
   arch/arm64/kvm/../../../virt/kvm/arm/mmu.c:369:15: sparse: sparse: cast from non-scalar
   arch/arm64/kvm/../../../virt/kvm/arm/mmu.c:462:43: sparse: sparse: cast to non-scalar
   arch/arm64/kvm/../../../virt/kvm/arm/mmu.c:462:43: sparse: sparse: cast from non-scalar
   arch/arm64/kvm/../../../virt/kvm/arm/mmu.c:471:28: sparse: sparse: cast to non-scalar
   arch/arm64/kvm/../../../virt/kvm/arm/mmu.c:471:28: sparse: sparse: cast from non-scalar
   arch/arm64/kvm/../../../virt/kvm/arm/mmu.c:482:27: sparse: sparse: cast to non-scalar
   arch/arm64/kvm/../../../virt/kvm/arm/mmu.c:482:27: sparse: sparse: cast from non-scalar
   arch/arm64/kvm/../../../virt/kvm/arm/mmu.c:499:27: sparse: sparse: cast to non-scalar
   arch/arm64/kvm/../../../virt/kvm/arm/mmu.c:499:27: sparse: sparse: cast from non-scalar
   arch/arm64/kvm/../../../virt/kvm/arm/mmu.c:618:23: sparse: sparse: cast to non-scalar
   arch/arm64/kvm/../../../virt/kvm/arm/mmu.c:618:23: sparse: sparse: cast from non-scalar
   arch/arm64/kvm/../../../virt/kvm/arm/mmu.c:635:23: sparse: sparse: cast to non-scalar
   arch/arm64/kvm/../../../virt/kvm/arm/mmu.c:635:23: sparse: sparse: cast from non-scalar
   arch/arm64/kvm/../../../virt/kvm/arm/mmu.c:1193:16: sparse: sparse: cast to non-scalar
   arch/arm64/kvm/../../../virt/kvm/arm/mmu.c:1193:16: sparse: sparse: cast from non-scalar
   arch/arm64/kvm/../../../virt/kvm/arm/mmu.c:1282:15: sparse: sparse: cast to non-scalar
   arch/arm64/kvm/../../../virt/kvm/arm/mmu.c:1282:15: sparse: sparse: cast from non-scalar
   arch/arm64/kvm/../../../virt/kvm/arm/mmu.c:1426:15: sparse: sparse: cast to non-scalar
   arch/arm64/kvm/../../../virt/kvm/arm/mmu.c:1426:15: sparse: sparse: cast from non-scalar
>> arch/arm64/include/asm/stage2_pgtable.h:176:24: sparse: sparse: cast to non-scalar
>> arch/arm64/include/asm/stage2_pgtable.h:176:24: sparse: sparse: cast from non-scalar
>> arch/arm64/include/asm/stage2_pgtable.h:176:24: sparse: sparse: cast to non-scalar
>> arch/arm64/include/asm/stage2_pgtable.h:176:24: sparse: sparse: cast from non-scalar
>> arch/arm64/include/asm/stage2_pgtable.h:176:24: sparse: sparse: cast to non-scalar
>> arch/arm64/include/asm/stage2_pgtable.h:176:24: sparse: sparse: cast from non-scalar
>> arch/arm64/include/asm/stage2_pgtable.h:176:24: sparse: sparse: cast to non-scalar
>> arch/arm64/include/asm/stage2_pgtable.h:176:24: sparse: sparse: cast from non-scalar
>> arch/arm64/include/asm/stage2_pgtable.h:176:24: sparse: sparse: cast to non-scalar
>> arch/arm64/include/asm/stage2_pgtable.h:176:24: sparse: sparse: cast from non-scalar
>> arch/arm64/include/asm/stage2_pgtable.h:176:24: sparse: sparse: cast to non-scalar
>> arch/arm64/include/asm/stage2_pgtable.h:176:24: sparse: sparse: cast from non-scalar
   arch/arm64/include/asm/pgtable.h:709:15: sparse: sparse: cast to non-scalar
   arch/arm64/include/asm/pgtable.h:709:15: sparse: sparse: cast from non-scalar
>> arch/arm64/include/asm/stage2_pgtable.h:176:24: sparse: sparse: cast to non-scalar
>> arch/arm64/include/asm/stage2_pgtable.h:176:24: sparse: sparse: cast from non-scalar

vim +192 arch/arm64/kernel/hibernate.c

82869ac57b5d3b James Morse    2016-04-27  181  
a2c2e67923ecb7 Pavel Tatashin 2019-12-04  182  static int trans_pgd_map_page(pgd_t *trans_pgd, void *page,
82869ac57b5d3b James Morse    2016-04-27  183  		       unsigned long dst_addr,
a2c2e67923ecb7 Pavel Tatashin 2019-12-04  184  		       pgprot_t pgprot)
82869ac57b5d3b James Morse    2016-04-27  185  {
20a004e7b017cc Will Deacon    2018-02-15  186  	pgd_t *pgdp;
20a004e7b017cc Will Deacon    2018-02-15  187  	pud_t *pudp;
20a004e7b017cc Will Deacon    2018-02-15  188  	pmd_t *pmdp;
20a004e7b017cc Will Deacon    2018-02-15  189  	pte_t *ptep;
82869ac57b5d3b James Morse    2016-04-27  190  
8c551f919a73c1 Pavel Tatashin 2019-10-14  191  	pgdp = pgd_offset_raw(trans_pgd, dst_addr);
20a004e7b017cc Will Deacon    2018-02-15 @192  	if (pgd_none(READ_ONCE(*pgdp))) {
051a7a94aaa9ca Pavel Tatashin 2019-12-04  193  		pudp = (void *)get_safe_page(GFP_ATOMIC);
a89d7ff933b015 Pavel Tatashin 2019-12-04  194  		if (!pudp)
a89d7ff933b015 Pavel Tatashin 2019-12-04  195  			return -ENOMEM;
20a004e7b017cc Will Deacon    2018-02-15  196  		pgd_populate(&init_mm, pgdp, pudp);
82869ac57b5d3b James Morse    2016-04-27  197  	}
82869ac57b5d3b James Morse    2016-04-27  198  
20a004e7b017cc Will Deacon    2018-02-15  199  	pudp = pud_offset(pgdp, dst_addr);
20a004e7b017cc Will Deacon    2018-02-15  200  	if (pud_none(READ_ONCE(*pudp))) {
051a7a94aaa9ca Pavel Tatashin 2019-12-04  201  		pmdp = (void *)get_safe_page(GFP_ATOMIC);
a89d7ff933b015 Pavel Tatashin 2019-12-04  202  		if (!pmdp)
a89d7ff933b015 Pavel Tatashin 2019-12-04  203  			return -ENOMEM;
20a004e7b017cc Will Deacon    2018-02-15  204  		pud_populate(&init_mm, pudp, pmdp);
82869ac57b5d3b James Morse    2016-04-27  205  	}
82869ac57b5d3b James Morse    2016-04-27  206  
20a004e7b017cc Will Deacon    2018-02-15  207  	pmdp = pmd_offset(pudp, dst_addr);
20a004e7b017cc Will Deacon    2018-02-15  208  	if (pmd_none(READ_ONCE(*pmdp))) {
051a7a94aaa9ca Pavel Tatashin 2019-12-04  209  		ptep = (void *)get_safe_page(GFP_ATOMIC);
a89d7ff933b015 Pavel Tatashin 2019-12-04  210  		if (!ptep)
a89d7ff933b015 Pavel Tatashin 2019-12-04  211  			return -ENOMEM;
20a004e7b017cc Will Deacon    2018-02-15  212  		pmd_populate_kernel(&init_mm, pmdp, ptep);
82869ac57b5d3b James Morse    2016-04-27  213  	}
82869ac57b5d3b James Morse    2016-04-27  214  
20a004e7b017cc Will Deacon    2018-02-15  215  	ptep = pte_offset_kernel(pmdp, dst_addr);
13373f0e658013 Pavel Tatashin 2019-12-04  216  	set_pte(ptep, pfn_pte(virt_to_pfn(page), PAGE_KERNEL_EXEC));
82869ac57b5d3b James Morse    2016-04-27  217  
a2c2e67923ecb7 Pavel Tatashin 2019-12-04  218  	return 0;
a2c2e67923ecb7 Pavel Tatashin 2019-12-04  219  }
a2c2e67923ecb7 Pavel Tatashin 2019-12-04  220  

:::::: The code at line 192 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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