[PATCH RFC v2 00/11] rust: Reimplement ThisModule to fix ownership problems

[Kari Argillander <kari.argillander@gmail.com>]

Still RFC. Not all people for each subsystems are not included yet as
this touch quite lot of things. Introducing new THIS_MODULE and
ThisModule still change configfs in same patch which is not ideal.

So currently we have problem that we are not always filling .owner field
for file_operations. I think we can enable const_refs_to_static already
as that is in 1.78 and is stable in 1.83. So that fits perfecly for us.
This also seems to be quite request feature but I did not found that no
one has ever suggested that we just enable this.

So basic idea is that we will have ThisModule trait which is used kernel
side. Module side we will always use THIS_MODULE. That is completly
private for modules and kernel cannot use it. So this unifies ways of
using cofing ThisModule things. Currently we have THIS_MODULE and also

  module: &' static ThisModule

on init functions. As we anyway need THIS_MODULE just use that.

    Argillander

To: Miguel Ojeda <ojeda@kernel.org>
To: Boqun Feng <boqun.feng@gmail.com>
To: Gary Guo <gary@garyguo.net>
To: Björn Roy Baron <bjorn3_gh@protonmail.com>
To: Benno Lossin <lossin@kernel.org>
To: Andreas Hindborg <a.hindborg@kernel.org>
To: Alice Ryhl <aliceryhl@google.com>
To: Trevor Gross <tmgross@umich.edu>
To: Danilo Krummrich <dakr@kernel.org>

To: Alexandre Courbot <acourbot@nvidia.com>

Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: Petr Pavlu <petr.pavlu@suse.com>
Cc: Daniel Gomez <da.gomez@kernel.org>
Cc: Sami Tolvanen <samitolvanen@google.com>
Cc: Aaron Tomlin <atomlin@atomlin.com>

Signed-off-by: Kari Argillander <kari.argillander@gmail.com>
---
Changes in v2:
- Patches are now sepereted properly.
- Removed debugfs changes as that is not so clear to me.
- Remove module parameter and just used THIS_MODULE everywhere.
- Made macro to make THIS_MODULE.
- Doc tests also have THIS_MODULE.
- Link to v1: https://lore.kernel.org/r/20260101-this_module_fix-v1-0-46ae3e5605a0@gmail.com

---
Kari Argillander (11):
      rust: enable const_refs_to_static feature
      rust: add new ThisModule trait and THIS_MODULE impl
      rust: miscdevice: fix use after free because missing .owner
      rust: block: fix missing owner field in block_device_operations
      rust: drm: fix missing owner in file_operations
      rust: driver: make RegistrationOps::register() to use new ThisModule
      rust: phy: make Registration::register() use new ThisModule
      rust: binder: use new THIS_MODULE
      rust: remove module argument from InPlaceModule::init()
      rust: remove kernel::ModuleMetadata
      rust: remove old version of ThisModule

 drivers/android/binder/rust_binder_main.rs |   5 +-
 drivers/block/rnull/configfs.rs            |   2 +-
 drivers/block/rnull/rnull.rs               |   3 +-
 drivers/gpu/drm/nova/driver.rs             |   2 +
 drivers/gpu/drm/tyr/driver.rs              |   2 +
 drivers/gpu/nova-core/nova_core.rs         |   2 +-
 lib/find_bit_benchmark_rust.rs             |   3 +-
 rust/kernel/auxiliary.rs                   |  16 +--
 rust/kernel/block/mq.rs                    |   1 +
 rust/kernel/block/mq/gen_disk.rs           |  30 +-----
 rust/kernel/block/mq/operations.rs         |  30 ++++++
 rust/kernel/configfs.rs                    |  49 ++++-----
 rust/kernel/driver.rs                      |  31 +++---
 rust/kernel/drm/device.rs                  |   2 +-
 rust/kernel/drm/driver.rs                  |   4 +
 rust/kernel/drm/gem/mod.rs                 |   5 +-
 rust/kernel/firmware.rs                    |   4 +-
 rust/kernel/i2c.rs                         |  11 +-
 rust/kernel/lib.rs                         | 161 ++++++++++++++++++++++++-----
 rust/kernel/miscdevice.rs                  |   5 +
 rust/kernel/net/phy.rs                     |  29 ++++--
 rust/kernel/pci.rs                         |  15 +--
 rust/kernel/platform.rs                    |  12 +--
 rust/kernel/prelude.rs                     |   2 +-
 rust/kernel/sync/lock/global.rs            |   4 +-
 rust/kernel/usb.rs                         |  13 +--
 rust/macros/lib.rs                         |   4 +-
 rust/macros/module.rs                      |  24 +----
 samples/rust/rust_configfs.rs              |   2 +-
 samples/rust/rust_debugfs_scoped.rs        |   2 +-
 samples/rust/rust_driver_auxiliary.rs      |   8 +-
 samples/rust/rust_driver_faux.rs           |   2 +-
 samples/rust/rust_minimal.rs               |   2 +-
 samples/rust/rust_misc_device.rs           |   3 +-
 samples/rust/rust_print_main.rs            |   2 +-
 scripts/rustdoc_test_gen.rs                |   2 +
 36 files changed, 298 insertions(+), 196 deletions(-)
---
base-commit: 6cd6c12031130a349a098dbeb19d8c3070d2dfbe
change-id: 20251230-this_module_fix-a390bff24897

Best regards,
-- 
Kari Argillander <kari.argillander@gmail.com>