[linux-next:master 2999/3150] arch/arm64/mm/mmu.c:1340:5: error: redefinition of 'pud_set_huge'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   cd557f1c605fc5a2c0eb0b540610f50dc67dd849
commit: fc3883f43885e02525a495377573ed948f73755a [2999/3150] mm/pgtable: add stubs for {pmd/pub}_{set/clear}_huge
config: arm64-randconfig-r031-20210514 (attached as .config)
compiler: aarch64-linux-gcc (GCC) 9.3.0
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/next/linux-next.git/commit/?id=fc3883f43885e02525a495377573ed948f73755a
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout fc3883f43885e02525a495377573ed948f73755a
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1 ARCH=arm64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <redacted>

All errors (new ones prefixed by >>):

quoted

arch/arm64/mm/mmu.c:1340:5: error: redefinition of 'pud_set_huge'

    1340 | int pud_set_huge(pud_t *pudp, phys_addr_t phys, pgprot_t prot)
         |     ^~~~~~~~~~~~
   In file included from include/linux/mm.h:33,
                    from include/linux/pid_namespace.h:7,
                    from include/linux/ptrace.h:10,
                    from include/linux/elfcore.h:11,
                    from include/linux/crash_core.h:6,
                    from include/linux/kexec.h:18,
                    from arch/arm64/mm/mmu.c:15:
   include/linux/pgtable.h:1378:19: note: previous definition of 'pud_set_huge' was here
    1378 | static inline int pud_set_huge(pud_t *pud, phys_addr_t addr, pgprot_t prot)
         |                   ^~~~~~~~~~~~

quoted

arch/arm64/mm/mmu.c:1368:5: error: redefinition of 'pud_clear_huge'

    1368 | int pud_clear_huge(pud_t *pudp)
         |     ^~~~~~~~~~~~~~
   In file included from include/linux/mm.h:33,
                    from include/linux/pid_namespace.h:7,
                    from include/linux/ptrace.h:10,
                    from include/linux/elfcore.h:11,
                    from include/linux/crash_core.h:6,
                    from include/linux/kexec.h:18,
                    from arch/arm64/mm/mmu.c:15:
   include/linux/pgtable.h:1382:19: note: previous definition of 'pud_clear_huge' was here
    1382 | static inline int pud_clear_huge(pud_t *pud)
         |                   ^~~~~~~~~~~~~~


vim +/pud_set_huge +1340 arch/arm64/mm/mmu.c

61bd93ce801bb6 Ard Biesheuvel    2015-06-01  1339  
20a004e7b017cc Will Deacon       2018-02-15 @1340  int pud_set_huge(pud_t *pudp, phys_addr_t phys, pgprot_t prot)
324420bf91f605 Ard Biesheuvel    2016-02-16  1341  {
f7f0097af67c3c Anshuman Khandual 2019-05-27  1342  	pud_t new_pud = pfn_pud(__phys_to_pfn(phys), mk_pud_sect_prot(prot));
15122ee2c515a2 Will Deacon       2018-02-21  1343  
82034c23fcbc23 Laura Abbott      2018-05-23  1344  	/* Only allow permission changes for now */
82034c23fcbc23 Laura Abbott      2018-05-23  1345  	if (!pgattr_change_is_safe(READ_ONCE(pud_val(*pudp)),
82034c23fcbc23 Laura Abbott      2018-05-23  1346  				   pud_val(new_pud)))
15122ee2c515a2 Will Deacon       2018-02-21  1347  		return 0;
15122ee2c515a2 Will Deacon       2018-02-21  1348  
87dedf7c61ab07 Anshuman Khandual 2019-05-27  1349  	VM_BUG_ON(phys & ~PUD_MASK);
82034c23fcbc23 Laura Abbott      2018-05-23  1350  	set_pud(pudp, new_pud);
324420bf91f605 Ard Biesheuvel    2016-02-16  1351  	return 1;
324420bf91f605 Ard Biesheuvel    2016-02-16  1352  }
324420bf91f605 Ard Biesheuvel    2016-02-16  1353  
20a004e7b017cc Will Deacon       2018-02-15  1354  int pmd_set_huge(pmd_t *pmdp, phys_addr_t phys, pgprot_t prot)
324420bf91f605 Ard Biesheuvel    2016-02-16  1355  {
f7f0097af67c3c Anshuman Khandual 2019-05-27  1356  	pmd_t new_pmd = pfn_pmd(__phys_to_pfn(phys), mk_pmd_sect_prot(prot));
15122ee2c515a2 Will Deacon       2018-02-21  1357  
82034c23fcbc23 Laura Abbott      2018-05-23  1358  	/* Only allow permission changes for now */
82034c23fcbc23 Laura Abbott      2018-05-23  1359  	if (!pgattr_change_is_safe(READ_ONCE(pmd_val(*pmdp)),
82034c23fcbc23 Laura Abbott      2018-05-23  1360  				   pmd_val(new_pmd)))
15122ee2c515a2 Will Deacon       2018-02-21  1361  		return 0;
15122ee2c515a2 Will Deacon       2018-02-21  1362  
87dedf7c61ab07 Anshuman Khandual 2019-05-27  1363  	VM_BUG_ON(phys & ~PMD_MASK);
82034c23fcbc23 Laura Abbott      2018-05-23  1364  	set_pmd(pmdp, new_pmd);
324420bf91f605 Ard Biesheuvel    2016-02-16  1365  	return 1;
324420bf91f605 Ard Biesheuvel    2016-02-16  1366  }
324420bf91f605 Ard Biesheuvel    2016-02-16  1367  
20a004e7b017cc Will Deacon       2018-02-15 @1368  int pud_clear_huge(pud_t *pudp)
324420bf91f605 Ard Biesheuvel    2016-02-16  1369  {
20a004e7b017cc Will Deacon       2018-02-15  1370  	if (!pud_sect(READ_ONCE(*pudp)))
324420bf91f605 Ard Biesheuvel    2016-02-16  1371  		return 0;
20a004e7b017cc Will Deacon       2018-02-15  1372  	pud_clear(pudp);
324420bf91f605 Ard Biesheuvel    2016-02-16  1373  	return 1;
324420bf91f605 Ard Biesheuvel    2016-02-16  1374  }
324420bf91f605 Ard Biesheuvel    2016-02-16  1375  

:::::: The code at line 1340 was first introduced by commit
:::::: 20a004e7b017cce282a46ac5d02c2b9c6b9bb1fa arm64: mm: Use READ_ONCE/WRITE_ONCE when accessing page tables

:::::: TO: Will Deacon [off-list ref]
:::::: CC: Catalin Marinas [off-list ref]

---
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