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+0800, kernel test robot wrote: > 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 > | 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); This is totally valid? vma_flags_set_mask() (which is ultimately invoked) uses ACCESS_PRIVATE() consistently. I wonder if mk_vma_flags() is an issue as it ultimately does (const vma_flag_t []){ VMA_SEQ_READ_BIT } here that then gets 'dereferenced' by array access in __mk_vma_flags(). Nothing is accessing __vma_flags in vma_flags_t directly however, it's all via ACCESS_PRIVATE() as far as I can tell? > 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 > > -- > 0-DAY CI Kernel Test Service > https://github.com/intel/lkp-tests/wiki Thanks, Lorenzo