Re: [PATCH v4 5/9] rust: debugfs: implement Directory trait for Dir

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

Hi Timur,

kernel test robot noticed the following build errors:

[auto build test ERROR on 654826aa4a8f25cf825ad9254f37e6cb5092098f]

url:    https://github.com/intel-lab-lkp/linux/commits/Timur-Tabi/rust-pci-add-PCI-device-name-method/20260114-065717
base:   654826aa4a8f25cf825ad9254f37e6cb5092098f
patch link:    https://lore.kernel.org/r/20260113225408.671252-6-ttabi%40nvidia.com
patch subject: [PATCH v4 5/9] rust: debugfs: implement Directory trait for Dir
config: x86_64-randconfig-122-20260114 (https://download.01.org/0day-ci/archive/20260116/202601160158.7mf9LG1y-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
rustc: rustc 1.88.0 (6b00bc388 2025-06-23)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260116/202601160158.7mf9LG1y-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/202601160158.7mf9LG1y-lkp@intel.com/

All errors (new ones prefixed by >>):

>> error[E0599]: no function or associated item named `new` found for struct `Dir` in the current scope
   --> rust/doctests_kernel_generated.rs:4085:16
   |
   4085 | let dir = Dir::new(c_str!("my_debugfs_dir"));
   |                ^^^ function or associated item not found in `Dir`
   |
   = help: items from traits can only be used if the trait is in scope
   help: trait `Directory` which provides `new` is implemented but not in scope; perhaps you want to import it
   |
   3    + use crate::rust_doctest_kernel_alloc_allocator_rs_0::kernel::debugfs::Directory;
   |
--
>> error[E0599]: no function or associated item named `new` found for struct `Dir` in the current scope
   --> rust/doctests_kernel_generated.rs:4145:16
   |
   4145 | let dir = Dir::new(c_str!("my_debugfs_dir"));
   |                ^^^ function or associated item not found in `Dir`
   |
   = help: items from traits can only be used if the trait is in scope
   help: trait `Directory` which provides `new` is implemented but not in scope; perhaps you want to import it
   |
   3    + use crate::rust_doctest_kernel_alloc_allocator_rs_0::kernel::debugfs::Directory;
   |
--
>> error[E0599]: no function or associated item named `new` found for struct `Dir` in the current scope
   --> rust/doctests_kernel_generated.rs:4204:16
   |
   4204 | let dir = Dir::new(c_str!("foo"));
   |                ^^^ function or associated item not found in `Dir`
   |
   = help: items from traits can only be used if the trait is in scope
   help: trait `Directory` which provides `new` is implemented but not in scope; perhaps you want to import it
   |
   3    + use crate::rust_doctest_kernel_alloc_allocator_rs_0::kernel::debugfs::Directory;
   |
--
>> error[E0599]: no function or associated item named `new` found for struct `Dir` in the current scope
   --> rust/doctests_kernel_generated.rs:3973:20
   |
   3973 | let debugfs = Dir::new(c_str!("parent"));
   |                    ^^^ function or associated item not found in `Dir`
   |
   = help: items from traits can only be used if the trait is in scope
   help: trait `Directory` which provides `new` is implemented but not in scope; perhaps you want to import it
   |
   3    + use crate::rust_doctest_kernel_alloc_allocator_rs_0::kernel::debugfs::Directory;
   |
--
>> error[E0599]: no function or associated item named `new` found for struct `Dir` in the current scope
   --> rust/doctests_kernel_generated.rs:4028:19
   |
   4028 | let parent = Dir::new(c_str!("parent"));
   |                   ^^^ function or associated item not found in `Dir`
   |
   = help: items from traits can only be used if the trait is in scope
   help: trait `Directory` which provides `new` is implemented but not in scope; perhaps you want to import it
   |
   3    + use crate::rust_doctest_kernel_alloc_allocator_rs_0::kernel::debugfs::Directory;
   |
--
>> error[E0599]: no function or associated item named `new` found for struct `Dir` in the current scope
   --> rust/doctests_kernel_generated.rs:11462:20
   |
   11462 |     let dir = Dir::new(pdev.name());
   |                    ^^^ function or associated item not found in `Dir`
   |
   = help: items from traits can only be used if the trait is in scope
   help: trait `Directory` which provides `new` is implemented but not in scope; perhaps you want to import it
   |
   3     + use crate::rust_doctest_kernel_alloc_allocator_rs_0::kernel::debugfs::Directory;
   |
--
>> error[E0599]: no function or associated item named `new` found for struct `Dir` in the current scope
   --> samples/rust/rust_debugfs.rs:136:28
   |
   136 |         let debugfs = Dir::new(c_str!("sample_debugfs"));
   |                            ^^^ function or associated item not found in `Dir`
   |
   = help: items from traits can only be used if the trait is in scope
   help: trait `Directory` which provides `new` is implemented but not in scope; perhaps you want to import it
   |
   34  + use kernel::debugfs::Directory;
   |
--
>> error[E0599]: no function or associated item named `new` found for struct `Dir` in the current scope
   --> samples/rust/rust_debugfs_scoped.rs:134:29
   |
   134 |         let base_dir = Dir::new(c_str!("rust_scoped_debugfs"));
   |                             ^^^ function or associated item not found in `Dir`
   |
   = help: items from traits can only be used if the trait is in scope
   help: trait `Directory` which provides `new` is implemented but not in scope; perhaps you want to import it
   |
   9   + use kernel::debugfs::Directory;
   |

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