Re: [RFC] mm: Drop pxd_ERROR()

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

:::::: 
:::::: Manual check reason: "linux-review patch is more than 7 days old, verify it wasn't already superseded"
:::::: 

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
In-Reply-To: <20260806080639.1916749-1-anshuman.khandual@arm.com>
References: <20260806080639.1916749-1-anshuman.khandual@arm.com>
TO: Anshuman Khandual <anshuman.khandual@arm.com>

Hi Anshuman,

[This is a private test report for your RFC patch.]
kernel test robot noticed the following build errors:

[auto build test ERROR on akpm-mm/mm-everything]
[also build test ERROR on linux-review/Anshuman-Khandual/mm-Standardize-printing-for-pgtable-entries/20260709-124528 powerpc/next powerpc/fixes geert-m68k/for-next geert-m68k/for-linus tip/x86/core linus/master arnd-asm-generic/master v7.2 next-20260821]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Anshuman-Khandual/mm-Drop-pxd_ERROR/20260806-133639
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link:    https://lore.kernel.org/r/20260806080639.1916749-1-anshuman.khandual%40arm.com
patch subject: [RFC] mm: Drop pxd_ERROR()
:::::: branch date: 27 hours ago
:::::: commit date: 27 hours ago
config: parisc-defconfig (https://download.01.org/0day-ci/archive/20260825/202608250331.Hvrq389Y-lkp@intel.com/config)
compiler: hppa-linux-gcc (GCC) 16.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260825/202608250331.Hvrq389Y-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/r/202608250331.Hvrq389Y-lkp@intel.com/

All errors (new ones prefixed by >>):

   arch/parisc/kernel/pci-dma.c: In function 'unmap_uncached_pte':
>> arch/parisc/kernel/pci-dma.c:163:17: error: implicit declaration of function 'pmd_ERROR'; did you mean 'pgd_ERROR'? [-Wimplicit-function-declaration]
     163 |                 pmd_ERROR(*pmd);
         |                 ^~~~~~~~~
         |                 pgd_ERROR


vim +163 arch/parisc/kernel/pci-dma.c

^1da177e4c3f415 Linus Torvalds 2005-04-16  152  
^1da177e4c3f415 Linus Torvalds 2005-04-16  153  static inline void unmap_uncached_pte(pmd_t * pmd, unsigned long vaddr,
^1da177e4c3f415 Linus Torvalds 2005-04-16  154  		unsigned long size)
^1da177e4c3f415 Linus Torvalds 2005-04-16  155  {
^1da177e4c3f415 Linus Torvalds 2005-04-16  156  	pte_t * pte;
^1da177e4c3f415 Linus Torvalds 2005-04-16  157  	unsigned long end;
^1da177e4c3f415 Linus Torvalds 2005-04-16  158  	unsigned long orig_vaddr = vaddr;
^1da177e4c3f415 Linus Torvalds 2005-04-16  159  
^1da177e4c3f415 Linus Torvalds 2005-04-16  160  	if (pmd_none(*pmd))
^1da177e4c3f415 Linus Torvalds 2005-04-16  161  		return;
^1da177e4c3f415 Linus Torvalds 2005-04-16  162  	if (pmd_bad(*pmd)) {
^1da177e4c3f415 Linus Torvalds 2005-04-16 @163  		pmd_ERROR(*pmd);
^1da177e4c3f415 Linus Torvalds 2005-04-16  164  		pmd_clear(pmd);
^1da177e4c3f415 Linus Torvalds 2005-04-16  165  		return;
^1da177e4c3f415 Linus Torvalds 2005-04-16  166  	}
ffd3e90a8fda600 Hugh Dickins   2023-06-08  167  	pte = pte_offset_kernel(pmd, vaddr);
^1da177e4c3f415 Linus Torvalds 2005-04-16  168  	vaddr &= ~PMD_MASK;
^1da177e4c3f415 Linus Torvalds 2005-04-16  169  	end = vaddr + size;
^1da177e4c3f415 Linus Torvalds 2005-04-16  170  	if (end > PMD_SIZE)
^1da177e4c3f415 Linus Torvalds 2005-04-16  171  		end = PMD_SIZE;
^1da177e4c3f415 Linus Torvalds 2005-04-16  172  	do {
e82a3b75127188f Helge Deller   2009-06-16  173  		unsigned long flags;
^1da177e4c3f415 Linus Torvalds 2005-04-16  174  		pte_t page = *pte;
e82a3b75127188f Helge Deller   2009-06-16  175  
^1da177e4c3f415 Linus Torvalds 2005-04-16  176  		pte_clear(&init_mm, vaddr, pte);
e82a3b75127188f Helge Deller   2009-06-16  177  		purge_tlb_start(flags);
360bd6c658076f9 Helge Deller   2022-02-17  178  		pdtlb(SR_KERNEL, orig_vaddr);
e82a3b75127188f Helge Deller   2009-06-16  179  		purge_tlb_end(flags);
^1da177e4c3f415 Linus Torvalds 2005-04-16  180  		vaddr += PAGE_SIZE;
^1da177e4c3f415 Linus Torvalds 2005-04-16  181  		orig_vaddr += PAGE_SIZE;
^1da177e4c3f415 Linus Torvalds 2005-04-16  182  		pte++;
^1da177e4c3f415 Linus Torvalds 2005-04-16  183  		if (pte_none(page) || pte_present(page))
^1da177e4c3f415 Linus Torvalds 2005-04-16  184  			continue;
^1da177e4c3f415 Linus Torvalds 2005-04-16  185  		printk(KERN_CRIT "Whee.. Swapped out page in kernel page table\n");
^1da177e4c3f415 Linus Torvalds 2005-04-16  186  	} while (vaddr < end);
^1da177e4c3f415 Linus Torvalds 2005-04-16  187  }
^1da177e4c3f415 Linus Torvalds 2005-04-16  188  

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