Re: [PATCH v3 6/6] rust: use strict provenance APIs

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

Hi Tamir,

kernel test robot noticed the following build errors:

[auto build test ERROR on a1eb95d6b5f4cf5cc7b081e85e374d1dd98a213b]

url:    https://github.com/intel-lab-lkp/linux/commits/Tamir-Duberstein/rust-retain-pointer-mut-ness-in-container_of/20250315-003150
base:   a1eb95d6b5f4cf5cc7b081e85e374d1dd98a213b
patch link:    https://lore.kernel.org/r/20250314-ptr-as-ptr-v3-6-e7ba61048f4a%40gmail.com
patch subject: [PATCH v3 6/6] rust: use strict provenance APIs
config: x86_64-randconfig-002-20250315 (https://download.01.org/0day-ci/archive/20250315/202503151519.6bGsjUd3-lkp@intel.com/config)
compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90)
rustc: rustc 1.78.0 (9b00956e5 2024-04-29)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250315/202503151519.6bGsjUd3-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/202503151519.6bGsjUd3-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from arch/x86/kernel/asm-offsets.c:14:
   In file included from include/linux/suspend.h:5:
   In file included from include/linux/swap.h:9:
   In file included from include/linux/memcontrol.h:21:
   In file included from include/linux/mm.h:2224:
   include/linux/vmstat.h:504:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
   504 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
   |                            ~~~~~~~~~~~~~~~~~~~~~ ^
   505 |                            item];
   |                            ~~~~
   include/linux/vmstat.h:511:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
   511 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
   |                            ~~~~~~~~~~~~~~~~~~~~~ ^
   512 |                            NR_VM_NUMA_EVENT_ITEMS +
   |                            ~~~~~~~~~~~~~~~~~~~~~~
   2 warnings generated.
   ***
   *** Rust bindings generator 'bindgen' < 0.69.5 together with libclang >= 19.1
   *** may not work due to a bug (https://github.com/rust-lang/rust-bindgen/pull/2824),
   *** unless patched (like Debian's).
   ***   Your bindgen version:  0.65.1
   ***   Your libclang version: 19.1.7
   ***
   ***
   *** Please see Documentation/rust/quick-start.rst for details
   *** on how to set up the Rust support.
   ***
   In file included from rust/helpers/helpers.c:10:
   In file included from rust/helpers/blk.c:3:
   In file included from include/linux/blk-mq.h:5:
   In file included from include/linux/blkdev.h:9:
   In file included from include/linux/blk_types.h:10:
   In file included from include/linux/bvec.h:10:
   In file included from include/linux/highmem.h:8:
   In file included from include/linux/cacheflush.h:5:
   In file included from arch/x86/include/asm/cacheflush.h:5:
   In file included from include/linux/mm.h:2224:
   include/linux/vmstat.h:504:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
   504 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
   |                            ~~~~~~~~~~~~~~~~~~~~~ ^
   505 |                            item];
   |                            ~~~~
   include/linux/vmstat.h:511:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
   511 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
   |                            ~~~~~~~~~~~~~~~~~~~~~ ^
   512 |                            NR_VM_NUMA_EVENT_ITEMS +
   |                            ~~~~~~~~~~~~~~~~~~~~~~
   2 warnings generated.
   clang diag: include/linux/vmstat.h:504:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
   clang diag: include/linux/vmstat.h:511:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
   clang diag: include/linux/vmstat.h:504:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
   clang diag: include/linux/vmstat.h:511:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
   clang diag: include/linux/vmstat.h:504:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
   clang diag: include/linux/vmstat.h:511:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
>> error[E0425]: cannot find function `with_exposed_provenance` in module `core::ptr`
   --> rust/kernel/lib.rs:37:20
   |
   37  |         core::ptr::with_exposed_provenance(addr)
   |                    ^^^^^^^^^^^^^^^^^^^^^^^
   |
   ::: /opt/cross/rustc-1.78.0-bindgen-0.65.1/rustup/toolchains/1.78.0-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:593:1
   |
   593 | pub const fn without_provenance<T>(addr: usize) -> *const T {
   | ----------------------------------------------------------- similarly named function `without_provenance` defined here
   |
   help: a function with a similar name exists
   |
   37  |         core::ptr::without_provenance(addr)
   |                    ~~~~~~~~~~~~~~~~~~
   help: consider importing this function through its public re-export
   |
   30  +     use crate::with_exposed_provenance;
   |
   help: if you import `with_exposed_provenance`, refer to it directly
   |
   37  -         core::ptr::with_exposed_provenance(addr)
   37  +         with_exposed_provenance(addr)
   |
--
>> error[E0425]: cannot find function `with_exposed_provenance_mut` in module `core::ptr`
   --> rust/kernel/lib.rs:42:20
   |
   42  |         core::ptr::with_exposed_provenance_mut(addr)
   |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   ::: /opt/cross/rustc-1.78.0-bindgen-0.65.1/rustup/toolchains/1.78.0-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:637:1
   |
   637 | pub const fn without_provenance_mut<T>(addr: usize) -> *mut T {
   | ------------------------------------------------------------- similarly named function `without_provenance_mut` defined here
   |
   help: a function with a similar name exists
   |
   42  |         core::ptr::without_provenance_mut(addr)
   |                    ~~~~~~~~~~~~~~~~~~~~~~
   help: consider importing this function through its public re-export
   |
   30  +     use crate::with_exposed_provenance_mut;
   |
   help: if you import `with_exposed_provenance_mut`, refer to it directly
   |
   42  -         core::ptr::with_exposed_provenance_mut(addr)
   42  +         with_exposed_provenance_mut(addr)
   |
--
>> error[E0599]: no method named `expose_provenance` found for raw pointer `*const T` in the current scope
   --> rust/kernel/lib.rs:32:14
   |
   32 |         addr.expose_provenance()
   |              ^^^^^^^^^^^^^^^^^ method not found in `*const T`
   |
   = note: try using `<*const T>::as_ref()` to get a reference to the type behind the pointer: https://doc.rust-lang.org/std/primitive.pointer.html#method.as_ref
   = note: using `<*const T>::as_ref()` on a pointer which is unaligned or points to invalid or uninitialized memory is undefined behavior

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