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Message-ID: <202512112044.HKImx4Ds-lkp@intel.com>
Date: Thu, 11 Dec 2025 21:00:16 +0800
From: kernel test robot <lkp@...el.com>
To: Alistair Popple <apopple@...dia.com>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
Andrew Morton <akpm@...ux-foundation.org>,
Linux Memory Management List <linux-mm@...ck.org>,
Dan Williams <dan.j.williams@...el.com>
Subject: fs/dax.c:1891:16: sparse: sparse: incorrect type in return
expression (different base types)
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: d358e5254674b70f34c847715ca509e46eb81e6f
commit: 38607c62b34b46317c46d5baf1df03ac6e48a1c6 fs/dax: properly refcount fs dax pages
date: 9 months ago
config: x86_64-randconfig-r113-20251211 (https://download.01.org/0day-ci/archive/20251211/202512112044.HKImx4Ds-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251211/202512112044.HKImx4Ds-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202512112044.HKImx4Ds-lkp@intel.com/
sparse warnings: (new ones prefixed by >>)
fs/dax.c: note: in included file (through include/trace/trace_events.h, include/trace/define_trace.h, include/trace/events/fs_dax.h):
include/trace/events/fs_dax.h:10:1: sparse: sparse: incorrect type in initializer (different base types) @@ expected unsigned long mask @@ got restricted vm_fault_t @@
include/trace/events/fs_dax.h:10:1: sparse: expected unsigned long mask
include/trace/events/fs_dax.h:10:1: sparse: got restricted vm_fault_t
include/trace/events/fs_dax.h:10:1: sparse: sparse: incorrect type in initializer (different base types) @@ expected unsigned long mask @@ got restricted vm_fault_t @@
include/trace/events/fs_dax.h:10:1: sparse: expected unsigned long mask
include/trace/events/fs_dax.h:10:1: sparse: got restricted vm_fault_t
include/trace/events/fs_dax.h:10:1: sparse: sparse: incorrect type in initializer (different base types) @@ expected unsigned long mask @@ got restricted vm_fault_t @@
include/trace/events/fs_dax.h:10:1: sparse: expected unsigned long mask
include/trace/events/fs_dax.h:10:1: sparse: got restricted vm_fault_t
include/trace/events/fs_dax.h:10:1: sparse: sparse: incorrect type in initializer (different base types) @@ expected unsigned long mask @@ got restricted vm_fault_t @@
include/trace/events/fs_dax.h:10:1: sparse: expected unsigned long mask
include/trace/events/fs_dax.h:10:1: sparse: got restricted vm_fault_t
include/trace/events/fs_dax.h:10:1: sparse: sparse: incorrect type in initializer (different base types) @@ expected unsigned long mask @@ got restricted vm_fault_t @@
include/trace/events/fs_dax.h:10:1: sparse: expected unsigned long mask
include/trace/events/fs_dax.h:10:1: sparse: got restricted vm_fault_t
include/trace/events/fs_dax.h:10:1: sparse: sparse: incorrect type in initializer (different base types) @@ expected unsigned long mask @@ got restricted vm_fault_t @@
include/trace/events/fs_dax.h:10:1: sparse: expected unsigned long mask
include/trace/events/fs_dax.h:10:1: sparse: got restricted vm_fault_t
include/trace/events/fs_dax.h:10:1: sparse: sparse: incorrect type in initializer (different base types) @@ expected unsigned long mask @@ got restricted vm_fault_t @@
include/trace/events/fs_dax.h:10:1: sparse: expected unsigned long mask
include/trace/events/fs_dax.h:10:1: sparse: got restricted vm_fault_t
include/trace/events/fs_dax.h:10:1: sparse: sparse: incorrect type in initializer (different base types) @@ expected unsigned long mask @@ got restricted vm_fault_t @@
include/trace/events/fs_dax.h:10:1: sparse: expected unsigned long mask
include/trace/events/fs_dax.h:10:1: sparse: got restricted vm_fault_t
include/trace/events/fs_dax.h:10:1: sparse: sparse: incorrect type in initializer (different base types) @@ expected unsigned long mask @@ got restricted vm_fault_t @@
include/trace/events/fs_dax.h:10:1: sparse: expected unsigned long mask
include/trace/events/fs_dax.h:10:1: sparse: got restricted vm_fault_t
include/trace/events/fs_dax.h:10:1: sparse: sparse: incorrect type in initializer (different base types) @@ expected unsigned long mask @@ got restricted vm_fault_t @@
include/trace/events/fs_dax.h:10:1: sparse: expected unsigned long mask
include/trace/events/fs_dax.h:10:1: sparse: got restricted vm_fault_t
include/trace/events/fs_dax.h:10:1: sparse: sparse: incorrect type in initializer (different base types) @@ expected unsigned long mask @@ got restricted vm_fault_t @@
include/trace/events/fs_dax.h:10:1: sparse: expected unsigned long mask
include/trace/events/fs_dax.h:10:1: sparse: got restricted vm_fault_t
include/trace/events/fs_dax.h:10:1: sparse: sparse: incorrect type in initializer (different base types) @@ expected unsigned long mask @@ got restricted vm_fault_t @@
include/trace/events/fs_dax.h:10:1: sparse: expected unsigned long mask
include/trace/events/fs_dax.h:10:1: sparse: got restricted vm_fault_t
include/trace/events/fs_dax.h:10:1: sparse: sparse: incorrect type in initializer (different base types) @@ expected unsigned long mask @@ got restricted vm_fault_t @@
include/trace/events/fs_dax.h:10:1: sparse: expected unsigned long mask
include/trace/events/fs_dax.h:10:1: sparse: got restricted vm_fault_t
include/trace/events/fs_dax.h:153:1: sparse: sparse: incorrect type in initializer (different base types) @@ expected unsigned long mask @@ got restricted vm_fault_t @@
include/trace/events/fs_dax.h:153:1: sparse: expected unsigned long mask
include/trace/events/fs_dax.h:153:1: sparse: got restricted vm_fault_t
include/trace/events/fs_dax.h:153:1: sparse: sparse: incorrect type in initializer (different base types) @@ expected unsigned long mask @@ got restricted vm_fault_t @@
include/trace/events/fs_dax.h:153:1: sparse: expected unsigned long mask
include/trace/events/fs_dax.h:153:1: sparse: got restricted vm_fault_t
include/trace/events/fs_dax.h:153:1: sparse: sparse: incorrect type in initializer (different base types) @@ expected unsigned long mask @@ got restricted vm_fault_t @@
include/trace/events/fs_dax.h:153:1: sparse: expected unsigned long mask
include/trace/events/fs_dax.h:153:1: sparse: got restricted vm_fault_t
include/trace/events/fs_dax.h:153:1: sparse: sparse: incorrect type in initializer (different base types) @@ expected unsigned long mask @@ got restricted vm_fault_t @@
include/trace/events/fs_dax.h:153:1: sparse: expected unsigned long mask
include/trace/events/fs_dax.h:153:1: sparse: got restricted vm_fault_t
include/trace/events/fs_dax.h:153:1: sparse: sparse: incorrect type in initializer (different base types) @@ expected unsigned long mask @@ got restricted vm_fault_t @@
include/trace/events/fs_dax.h:153:1: sparse: expected unsigned long mask
include/trace/events/fs_dax.h:153:1: sparse: got restricted vm_fault_t
include/trace/events/fs_dax.h:153:1: sparse: sparse: incorrect type in initializer (different base types) @@ expected unsigned long mask @@ got restricted vm_fault_t @@
include/trace/events/fs_dax.h:153:1: sparse: expected unsigned long mask
include/trace/events/fs_dax.h:153:1: sparse: got restricted vm_fault_t
include/trace/events/fs_dax.h:153:1: sparse: sparse: incorrect type in initializer (different base types) @@ expected unsigned long mask @@ got restricted vm_fault_t @@
include/trace/events/fs_dax.h:153:1: sparse: expected unsigned long mask
include/trace/events/fs_dax.h:153:1: sparse: got restricted vm_fault_t
include/trace/events/fs_dax.h:153:1: sparse: sparse: incorrect type in initializer (different base types) @@ expected unsigned long mask @@ got restricted vm_fault_t @@
include/trace/events/fs_dax.h:153:1: sparse: expected unsigned long mask
include/trace/events/fs_dax.h:153:1: sparse: got restricted vm_fault_t
include/trace/events/fs_dax.h:153:1: sparse: sparse: incorrect type in initializer (different base types) @@ expected unsigned long mask @@ got restricted vm_fault_t @@
include/trace/events/fs_dax.h:153:1: sparse: expected unsigned long mask
include/trace/events/fs_dax.h:153:1: sparse: got restricted vm_fault_t
include/trace/events/fs_dax.h:153:1: sparse: sparse: incorrect type in initializer (different base types) @@ expected unsigned long mask @@ got restricted vm_fault_t @@
include/trace/events/fs_dax.h:153:1: sparse: expected unsigned long mask
include/trace/events/fs_dax.h:153:1: sparse: got restricted vm_fault_t
include/trace/events/fs_dax.h:153:1: sparse: sparse: incorrect type in initializer (different base types) @@ expected unsigned long mask @@ got restricted vm_fault_t @@
include/trace/events/fs_dax.h:153:1: sparse: expected unsigned long mask
include/trace/events/fs_dax.h:153:1: sparse: got restricted vm_fault_t
include/trace/events/fs_dax.h:153:1: sparse: sparse: incorrect type in initializer (different base types) @@ expected unsigned long mask @@ got restricted vm_fault_t @@
include/trace/events/fs_dax.h:153:1: sparse: expected unsigned long mask
include/trace/events/fs_dax.h:153:1: sparse: got restricted vm_fault_t
include/trace/events/fs_dax.h:153:1: sparse: sparse: incorrect type in initializer (different base types) @@ expected unsigned long mask @@ got restricted vm_fault_t @@
include/trace/events/fs_dax.h:153:1: sparse: expected unsigned long mask
include/trace/events/fs_dax.h:153:1: sparse: got restricted vm_fault_t
fs/dax.c:727:39: sparse: sparse: incorrect type in argument 1 (different base types) @@ expected unsigned long v @@ got restricted vm_fault_t @@
fs/dax.c:727:39: sparse: expected unsigned long v
fs/dax.c:727:39: sparse: got restricted vm_fault_t
fs/dax.c:729:39: sparse: sparse: incorrect type in argument 1 (different base types) @@ expected unsigned long v @@ got restricted vm_fault_t @@
fs/dax.c:729:39: sparse: expected unsigned long v
fs/dax.c:729:39: sparse: got restricted vm_fault_t
fs/dax.c:733:31: sparse: sparse: incorrect type in argument 1 (different base types) @@ expected unsigned long v @@ got restricted vm_fault_t @@
fs/dax.c:733:31: sparse: expected unsigned long v
fs/dax.c:733:31: sparse: got restricted vm_fault_t
fs/dax.c:1376:41: sparse: sparse: incorrect type in argument 3 (different base types) @@ expected int result @@ got restricted vm_fault_t [assigned] [usertype] ret @@
fs/dax.c:1376:41: sparse: expected int result
fs/dax.c:1376:41: sparse: got restricted vm_fault_t [assigned] [usertype] ret
fs/dax.c:1885:21: sparse: sparse: incorrect type in assignment (different base types) @@ expected int ret @@ got restricted vm_fault_t @@
fs/dax.c:1885:21: sparse: expected int ret
fs/dax.c:1885:21: sparse: got restricted vm_fault_t
fs/dax.c:1888:21: sparse: sparse: incorrect type in assignment (different base types) @@ expected int ret @@ got restricted vm_fault_t @@
fs/dax.c:1888:21: sparse: expected int ret
fs/dax.c:1888:21: sparse: got restricted vm_fault_t
>> fs/dax.c:1891:16: sparse: sparse: incorrect type in return expression (different base types) @@ expected restricted vm_fault_t @@ got int ret @@
fs/dax.c:1891:16: sparse: expected restricted vm_fault_t
fs/dax.c:1891:16: sparse: got int ret
fs/dax.c:1909:46: sparse: sparse: incorrect type in argument 3 (different base types) @@ expected int result @@ got restricted vm_fault_t [usertype] ret @@
fs/dax.c:1909:46: sparse: expected int result
fs/dax.c:1909:46: sparse: got restricted vm_fault_t [usertype] ret
fs/dax.c:1925:21: sparse: sparse: incorrect type in assignment (different base types) @@ expected restricted vm_fault_t [assigned] [usertype] ret @@ got unsigned long @@
fs/dax.c:1925:21: sparse: expected restricted vm_fault_t [assigned] [usertype] ret
fs/dax.c:1925:21: sparse: got unsigned long
fs/dax.c:1966:51: sparse: sparse: incorrect type in argument 3 (different base types) @@ expected int result @@ got restricted vm_fault_t [assigned] [usertype] ret @@
fs/dax.c:1966:51: sparse: expected int result
fs/dax.c:1966:51: sparse: got restricted vm_fault_t [assigned] [usertype] ret
fs/dax.c:2142:55: sparse: sparse: incorrect type in argument 3 (different base types) @@ expected int result @@ got restricted vm_fault_t @@
fs/dax.c:2142:55: sparse: expected int result
fs/dax.c:2142:55: sparse: got restricted vm_fault_t
fs/dax.c:2160:58: sparse: sparse: incorrect type in argument 3 (different base types) @@ expected int result @@ got restricted vm_fault_t [assigned] [usertype] ret @@
fs/dax.c:2160:58: sparse: expected int result
fs/dax.c:2160:58: sparse: got restricted vm_fault_t [assigned] [usertype] ret
fs/dax.c:279:13: sparse: sparse: context imbalance in 'wait_entry_unlocked' - unexpected unlock
fs/dax.c:508:49: sparse: sparse: context imbalance in 'dax_lock_folio' - different lock contexts for basic block
fs/dax.c:575:17: sparse: sparse: context imbalance in 'dax_lock_mapping_entry' - different lock contexts for basic block
fs/dax.c:1148:9: sparse: sparse: context imbalance in 'dax_writeback_one' - unexpected unlock
vim +1891 fs/dax.c
1826
1827 /**
1828 * dax_fault_iter - Common actor to handle pfn insertion in PTE/PMD fault.
1829 * @vmf: vm fault instance
1830 * @iter: iomap iter
1831 * @pfnp: pfn to be returned
1832 * @xas: the dax mapping tree of a file
1833 * @entry: an unlocked dax entry to be inserted
1834 * @pmd: distinguish whether it is a pmd fault
1835 */
1836 static vm_fault_t dax_fault_iter(struct vm_fault *vmf,
1837 const struct iomap_iter *iter, pfn_t *pfnp,
1838 struct xa_state *xas, void **entry, bool pmd)
1839 {
1840 const struct iomap *iomap = &iter->iomap;
1841 const struct iomap *srcmap = iomap_iter_srcmap(iter);
1842 size_t size = pmd ? PMD_SIZE : PAGE_SIZE;
1843 loff_t pos = (loff_t)xas->xa_index << PAGE_SHIFT;
1844 bool write = iter->flags & IOMAP_WRITE;
1845 unsigned long entry_flags = pmd ? DAX_PMD : 0;
1846 struct folio *folio;
1847 int ret, err = 0;
1848 pfn_t pfn;
1849 void *kaddr;
1850
1851 if (!pmd && vmf->cow_page)
1852 return dax_fault_cow_page(vmf, iter);
1853
1854 /* if we are reading UNWRITTEN and HOLE, return a hole. */
1855 if (!write &&
1856 (iomap->type == IOMAP_UNWRITTEN || iomap->type == IOMAP_HOLE)) {
1857 if (!pmd)
1858 return dax_load_hole(xas, vmf, iter, entry);
1859 return dax_pmd_load_hole(xas, vmf, iter, entry);
1860 }
1861
1862 if (iomap->type != IOMAP_MAPPED && !(iomap->flags & IOMAP_F_SHARED)) {
1863 WARN_ON_ONCE(1);
1864 return pmd ? VM_FAULT_FALLBACK : VM_FAULT_SIGBUS;
1865 }
1866
1867 err = dax_iomap_direct_access(iomap, pos, size, &kaddr, &pfn);
1868 if (err)
1869 return pmd ? VM_FAULT_FALLBACK : dax_fault_return(err);
1870
1871 *entry = dax_insert_entry(xas, vmf, iter, *entry, pfn, entry_flags);
1872
1873 if (write && iomap->flags & IOMAP_F_SHARED) {
1874 err = dax_iomap_copy_around(pos, size, size, srcmap, kaddr);
1875 if (err)
1876 return dax_fault_return(err);
1877 }
1878
1879 folio = dax_to_folio(*entry);
1880 if (dax_fault_is_synchronous(iter, vmf->vma))
1881 return dax_fault_synchronous_pfnp(pfnp, pfn);
1882
1883 folio_ref_inc(folio);
1884 if (pmd)
1885 ret = vmf_insert_folio_pmd(vmf, pfn_folio(pfn_t_to_pfn(pfn)),
1886 write);
1887 else
1888 ret = vmf_insert_page_mkwrite(vmf, pfn_t_to_page(pfn), write);
1889 folio_put(folio);
1890
> 1891 return ret;
1892 }
1893
--
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https://github.com/intel/lkp-tests/wiki
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