[akpm-mm:mm-new 418/422] fs/orangefs/file.c:414:9: sparse: sparse: dereference of noderef expression

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

Hi Lorenzo,

FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-new
head:   e4348a62bb1acacafcdeb149c9363291fae08c0c
commit: ccbdd8044f13617fe9f2bce61aed556314544664 [418/422] mm: update all remaining mmap_prepare users to use vma_flags_t
config: arm-randconfig-r131-20260120 (https://download.01.org/0day-ci/archive/20260120/202601201701.IhxeGffs-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 11.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260120/202601201701.IhxeGffs-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/oe-kbuild-all/202601201701.IhxeGffs-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> fs/orangefs/file.c:414:9: sparse: sparse: dereference of noderef expression
   fs/orangefs/file.c: note: in included file (through arch/arm/include/asm/cacheflush.h, include/linux/cacheflush.h, include/linux/highmem.h, ...):
   include/linux/mm.h:1048:16: sparse: sparse: dereference of noderef expression
   include/linux/mm.h:1048:16: sparse: sparse: dereference of noderef expression
   include/linux/mm.h:1199:46: sparse: sparse: dereference of noderef expression
   include/linux/mm.h:1199:46: sparse: sparse: dereference of noderef expression
   fs/orangefs/file.c:415:9: sparse: sparse: dereference of noderef expression
   include/linux/mm.h:1048:16: sparse: sparse: dereference of noderef expression
   include/linux/mm.h:1048:16: sparse: sparse: dereference of noderef expression
   include/linux/mm.h:1216:48: sparse: sparse: dereference of noderef expression
   include/linux/mm.h:1216:48: sparse: sparse: dereference of noderef expression
--
>> fs/ramfs/file-nommu.c:267:40: sparse: sparse: dereference of noderef expression
>> fs/ramfs/file-nommu.c:267:40: sparse: sparse: dereference of noderef expression
   fs/ramfs/file-nommu.c: note: in included file:
   include/linux/mm.h:1954:16: sparse: sparse: dereference of noderef expression
   include/linux/mm.h:1954:16: sparse: sparse: dereference of noderef expression
   include/linux/mm.h:1048:16: sparse: sparse: dereference of noderef expression
   include/linux/mm.h:1954:16: sparse: sparse: dereference of noderef expression
   include/linux/mm.h:1048:16: sparse: sparse: dereference of noderef expression

vim +414 fs/orangefs/file.c

   397	
   398	/*
   399	 * Memory map a region of a file.
   400	 */
   401	static int orangefs_file_mmap_prepare(struct vm_area_desc *desc)
   402	{
   403		struct file *file = desc->file;
   404		int ret;
   405	
   406		ret = orangefs_revalidate_mapping(file_inode(file));
   407		if (ret)
   408			return ret;
   409	
   410		gossip_debug(GOSSIP_FILE_DEBUG,
   411			     "orangefs_file_mmap: called on %pD\n", file);
   412	
   413		/* set the sequential readahead hint */
 > 414		vma_desc_set_flags(desc, VMA_SEQ_READ_BIT);
   415		vma_desc_clear_flags(desc, VMA_RAND_READ_BIT);
   416	
   417		file_accessed(file);
   418		desc->vm_ops = &orangefs_file_vm_ops;
   419		return 0;
   420	}
   421	

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