mm/vmalloc.c:214:17: sparse: sparse: context imbalance in 'vmap_pages_pte_range' - different lock contexts for basic block

mm/vmalloc.c:214:17: sparse: sparse: context imbalance in 'vmap_pages_pte_range' - different lock contexts for basic block

[kernel test robot]

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CC: kbuild-all(a)lists.01.org
CC: linux-kernel(a)vger.kernel.org
TO: Nicholas Piggin <npiggin@gmail.com>
CC: Miaohe Lin <linmiaohe@huawei.com>
CC: Christoph Hellwig <hch@lst.de>
CC: Andrew Morton <akpm@linux-foundation.org>
CC: Linux Memory Management List <linux-mm@kvack.org>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   368094df48e680fa51cedb68537408cfa64b788e
commit: 0a264884046f1ab0c906a61fd838002ecf9ef408 mm/vmalloc: rename vmap_*_range vmap_pages_*_range
date:   6 weeks ago
:::::: branch date: 18 hours ago
:::::: commit date: 6 weeks ago
config: parisc-randconfig-s032-20210607 (attached as .config)
compiler: hppa64-linux-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.3-341-g8af24329-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0a264884046f1ab0c906a61fd838002ecf9ef408
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 0a264884046f1ab0c906a61fd838002ecf9ef408
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 ARCH=parisc 

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 >>)
   mm/vmalloc.c: note: in included file (through include/linux/pgtable.h, include/linux/mm.h):
   arch/parisc/include/asm/pgtable.h:451:9: sparse: sparse: context imbalance in 'vunmap_pte_range' - different lock contexts for basic block
>> mm/vmalloc.c:214:17: sparse: sparse: context imbalance in 'vmap_pages_pte_range' - different lock contexts for basic block
   mm/vmalloc.c:3482:13: sparse: sparse: context imbalance in 's_start' - wrong count at exit
   mm/vmalloc.c:3497:13: sparse: sparse: context imbalance in 's_stop' - wrong count at exit

vim +/vmap_pages_pte_range +214 mm/vmalloc.c

^1da177e4c3f41 Linus Torvalds  2005-04-16  191  
0a264884046f1a Nicholas Piggin 2021-04-29  192  static int vmap_pages_pte_range(pmd_t *pmd, unsigned long addr,
2ba3e6947aed9b Joerg Roedel    2020-06-01  193  		unsigned long end, pgprot_t prot, struct page **pages, int *nr,
2ba3e6947aed9b Joerg Roedel    2020-06-01  194  		pgtbl_mod_mask *mask)
^1da177e4c3f41 Linus Torvalds  2005-04-16  195  {
^1da177e4c3f41 Linus Torvalds  2005-04-16  196  	pte_t *pte;
^1da177e4c3f41 Linus Torvalds  2005-04-16  197  
db64fe02258f15 Nicholas Piggin 2008-10-18  198  	/*
db64fe02258f15 Nicholas Piggin 2008-10-18  199  	 * nr is a running index into the array which helps higher level
db64fe02258f15 Nicholas Piggin 2008-10-18  200  	 * callers keep track of where we're up to.
db64fe02258f15 Nicholas Piggin 2008-10-18  201  	 */
db64fe02258f15 Nicholas Piggin 2008-10-18  202  
2ba3e6947aed9b Joerg Roedel    2020-06-01  203  	pte = pte_alloc_kernel_track(pmd, addr, mask);
^1da177e4c3f41 Linus Torvalds  2005-04-16  204  	if (!pte)
^1da177e4c3f41 Linus Torvalds  2005-04-16  205  		return -ENOMEM;
^1da177e4c3f41 Linus Torvalds  2005-04-16  206  	do {
db64fe02258f15 Nicholas Piggin 2008-10-18  207  		struct page *page = pages[*nr];
db64fe02258f15 Nicholas Piggin 2008-10-18  208  
db64fe02258f15 Nicholas Piggin 2008-10-18  209  		if (WARN_ON(!pte_none(*pte)))
db64fe02258f15 Nicholas Piggin 2008-10-18  210  			return -EBUSY;
db64fe02258f15 Nicholas Piggin 2008-10-18  211  		if (WARN_ON(!page))
^1da177e4c3f41 Linus Torvalds  2005-04-16  212  			return -ENOMEM;
^1da177e4c3f41 Linus Torvalds  2005-04-16  213  		set_pte_at(&init_mm, addr, pte, mk_pte(page, prot));
db64fe02258f15 Nicholas Piggin 2008-10-18 @214  		(*nr)++;
^1da177e4c3f41 Linus Torvalds  2005-04-16  215  	} while (pte++, addr += PAGE_SIZE, addr != end);
2ba3e6947aed9b Joerg Roedel    2020-06-01  216  	*mask |= PGTBL_PTE_MODIFIED;
^1da177e4c3f41 Linus Torvalds  2005-04-16  217  	return 0;
^1da177e4c3f41 Linus Torvalds  2005-04-16  218  }
^1da177e4c3f41 Linus Torvalds  2005-04-16  219  

:::::: The code at line 214 was first introduced by commit
:::::: db64fe02258f1507e13fe5212a989922323685ce mm: rewrite vmap layer

:::::: TO: Nick Piggin <npiggin@suse.de>
:::::: CC: Linus Torvalds <torvalds@linux-foundation.org>

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

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