Hi Alice, kernel test robot noticed the following build errors: [auto build test ERROR on 40384c840ea1944d7c5a392e8975ed088ecf0b37] url: https://github.com/intel-lab-lkp/linux/commits/Alice-Ryhl/rust-miscdevice-access-file-in-fops/20241209-153054 base: 40384c840ea1944d7c5a392e8975ed088ecf0b37 patch link: https://lore.kernel.org/r/20241209-miscdevice-file-param-v2-2-83ece27e9ff6%40google.com patch subject: [PATCH v2 2/2] rust: miscdevice: access the `struct miscdevice` from fops->open() config: x86_64-rhel-9.4-rust (https://download.01.org/0day-ci/archive/20241209/202412092214.P4acQ6Rn-lkp@xxxxxxxxx/config) compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241209/202412092214.P4acQ6Rn-lkp@xxxxxxxxx/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@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202412092214.P4acQ6Rn-lkp@xxxxxxxxx/ 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:2223: 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 + | ~~~~~~~~~~~~~~~~~~~~~~ include/linux/vmstat.h:518:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion] 518 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_" | ~~~~~~~~~~~ ^ ~~~ include/linux/vmstat.h:524:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 524 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 525 | NR_VM_NUMA_EVENT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~~ 4 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: 19.1.3 *** *** *** 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:2223: 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 + | ~~~~~~~~~~~~~~~~~~~~~~ include/linux/vmstat.h:518:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion] 518 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_" | ~~~~~~~~~~~ ^ ~~~ include/linux/vmstat.h:524:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 524 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 525 | NR_VM_NUMA_EVENT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~~ 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:518:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion] clang diag: include/linux/vmstat.h:524:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 4 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:518:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion] clang diag: include/linux/vmstat.h:524:43: 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:518:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion] clang diag: include/linux/vmstat.h:524:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] >> error[E0277]: the size for values of type `Self` cannot be known at compilation time --> rust/kernel/miscdevice.rs:107:35 | 107 | fn open(_file: &File, _misc: &MiscDeviceRegistration<Self>) -> Result<Self::Ptr>; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time | note: required by an implicit `Sized` bound in `MiscDeviceRegistration` --> rust/kernel/miscdevice.rs:52:35 | 52 | pub struct MiscDeviceRegistration<T> { | ^ required by the implicit `Sized` requirement on this type parameter in `MiscDeviceRegistration` help: consider further restricting `Self` | 107 | fn open(_file: &File, _misc: &MiscDeviceRegistration<Self>) -> Result<Self::Ptr> where Self: Sized; | +++++++++++++++++ help: consider relaxing the implicit `Sized` restriction | 52 | pub struct MiscDeviceRegistration<T: ?Sized> { | ++++++++ -- >> error[E0609]: no field `private_data` on type `File` --> rust/kernel/miscdevice.rs:215:22 | 215 | unsafe { (*file).private_data = ptr.into_foreign().cast_mut() }; | ^^^^^^^^^^^^ unknown field -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
