[PATCH 0/3] rust: miscdevice: Add additional data to MiscDeviceRegistration
From: Christian Schrefl
Date: Sun Jan 19 2025 - 17:11:47 EST
This set is based on Greg's driver-core-next tree.
Currently there is no good way to pass arbitrary data from the driver to
a miscdevice or to share data between individual handles to a miscdevice in rust.
This series adds additional (generic) data to the MiscDeviceRegistration
for this purpose.
The first patch add the Aliased type.
The second patch implements the changes and fixes the build of the sample.
The third patch changes the rust_misc_device sample to use this to
share the same data between multiple handles to the miscdevice.
Some discussion on Zulip about the motivation and approach
(Thanks a lot to everyone helping me out with this):
Link: https://rust-for-linux.zulipchat.com/#narrow/channel/288089-General/topic/Passing.20a.20DevRes.20to.20a.20miscdev/near/494553814
Signed-off-by: Christian Schrefl <chrisi.schrefl@xxxxxxxxx>
---
Christian Schrefl (3):
rust: add Aliased type
rust: miscdevice: Add additional data to MiscDeviceRegistration
rust: miscdevice: adjust the rust_misc_device sample to use RegistrationData.
rust/kernel/miscdevice.rs | 37 ++++++++++++++++++++++++++++++-------
rust/kernel/types.rs | 40 ++++++++++++++++++++++++++++++++++++++++
samples/rust/rust_misc_device.rs | 22 ++++++++++++----------
3 files changed, 82 insertions(+), 17 deletions(-)
---
base-commit: 01b3cb620815fc3feb90ee117d9445a5b608a9f7
change-id: 20250119-b4-rust_miscdevice_registrationdata-a11d88dcb284
Best regards,
--
Christian Schrefl <chrisi.schrefl@xxxxxxxxx>