[linux-next:master 7528/14955] arch/powerpc/mm/book3s64/hash_4k.c:34:29: sparse: sparse: cast to non-scalar

[linux-next:master 7528/14955] arch/powerpc/mm/book3s64/hash_4k.c:34:29: sparse: sparse: cast to non-scalar

[kbuild test robot]

[-- Attachment #1: Type: text/plain, Size: 3224 bytes --]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   0e21d4620dd047da7952f44a2e1ac777ded2d57e
commit: 7b364f0949ae2dd205d5e9afa4b82ee17030d928 [7528/14955] READ_ONCE: Drop pointer qualifiers when reading from scalar types
config: powerpc64-randconfig-s032-20200602 (attached as .config)
compiler: powerpc64le-linux-gcc (GCC) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.1-244-g0ee050a8-dirty
        git checkout 7b364f0949ae2dd205d5e9afa4b82ee17030d928
        # save the attached .config to linux build tree
        make W=1 C=1 ARCH=powerpc64 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/powerpc/mm/book3s64/hash_4k.c:34:29: sparse: sparse: cast to non-scalar
>> arch/powerpc/mm/book3s64/hash_4k.c:34:29: sparse: sparse: cast from non-scalar

vim +34 arch/powerpc/mm/book3s64/hash_4k.c

a43c0eb8364c02 arch/powerpc/mm/hash64_4k.c Aneesh Kumar K.V 2015-12-01  18  
a43c0eb8364c02 arch/powerpc/mm/hash64_4k.c Aneesh Kumar K.V 2015-12-01  19  int __hash_page_4K(unsigned long ea, unsigned long access, unsigned long vsid,
a43c0eb8364c02 arch/powerpc/mm/hash64_4k.c Aneesh Kumar K.V 2015-12-01  20  		   pte_t *ptep, unsigned long trap, unsigned long flags,
a43c0eb8364c02 arch/powerpc/mm/hash64_4k.c Aneesh Kumar K.V 2015-12-01  21  		   int ssize, int subpg_prot)
a43c0eb8364c02 arch/powerpc/mm/hash64_4k.c Aneesh Kumar K.V 2015-12-01  22  {
a8548686463b67 arch/powerpc/mm/hash64_4k.c Ram Pai          2017-11-06  23  	real_pte_t rpte;
a43c0eb8364c02 arch/powerpc/mm/hash64_4k.c Aneesh Kumar K.V 2015-12-01  24  	unsigned long hpte_group;
a43c0eb8364c02 arch/powerpc/mm/hash64_4k.c Aneesh Kumar K.V 2015-12-01  25  	unsigned long rflags, pa;
a43c0eb8364c02 arch/powerpc/mm/hash64_4k.c Aneesh Kumar K.V 2015-12-01  26  	unsigned long old_pte, new_pte;
a43c0eb8364c02 arch/powerpc/mm/hash64_4k.c Aneesh Kumar K.V 2015-12-01  27  	unsigned long vpn, hash, slot;
a43c0eb8364c02 arch/powerpc/mm/hash64_4k.c Aneesh Kumar K.V 2015-12-01  28  	unsigned long shift = mmu_psize_defs[MMU_PAGE_4K].shift;
a43c0eb8364c02 arch/powerpc/mm/hash64_4k.c Aneesh Kumar K.V 2015-12-01  29  
a43c0eb8364c02 arch/powerpc/mm/hash64_4k.c Aneesh Kumar K.V 2015-12-01  30  	/*
a43c0eb8364c02 arch/powerpc/mm/hash64_4k.c Aneesh Kumar K.V 2015-12-01  31  	 * atomically mark the linux large page PTE busy and dirty
a43c0eb8364c02 arch/powerpc/mm/hash64_4k.c Aneesh Kumar K.V 2015-12-01  32  	 */
a43c0eb8364c02 arch/powerpc/mm/hash64_4k.c Aneesh Kumar K.V 2015-12-01  33  	do {
a43c0eb8364c02 arch/powerpc/mm/hash64_4k.c Aneesh Kumar K.V 2015-12-01 @34  		pte_t pte = READ_ONCE(*ptep);

:::::: The code at line 34 was first introduced by commit
:::::: a43c0eb8364c022725df586e91dd753633374d66 powerpc/mm: Convert 4k insert from asm to C

:::::: TO: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
:::::: CC: Michael Ellerman <mpe@ellerman.id.au>

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

[-- Attachment #2: config.gz --]
[-- Type: application/gzip, Size: 29747 bytes --]