[PATCH v2 0/5] rust: reduce pointer casts, enable related lints

Tamir Duberstein
2025-03-09T16:01:01Z

This started with a patch that enabled `clippy::ptr_as_ptr`. Benno
Lossin suggested I also look into `clippy::ptr_cast_constness` and I
discovered `clippy::as_ptr_cast_mut`. This series now enables all 3
lints. It also enables `clippy::as_underscore` which ensures other
pointer casts weren't missed. The first commit reduces the need for
pointer casts and is shared with another series[1].

Link: https://lore.kernel.org/all/20250307-no-offset-v1-0-0c728f63b69c@gmail.com/ [1]

Signed-off-by: Tamir Duberstein <tamird@gmail.com>
---
Changes in v2:
- Fixed typo in first commit message.
- Added additional patches, converted to series.
- Link to v1: https://lore.kernel.org/r/20250307-ptr-as-ptr-v1-1-582d06514c98@gmail.com

---
Tamir Duberstein (5):
rust: retain pointer mut-ness in `container_of!`
rust: enable `clippy::ptr_as_ptr` lint
rust: enable `clippy::ptr_cast_constness` lint
rust: enable `clippy::as_ptr_cast_mut` lint
rust: enable `clippy::as_underscore` lint

Makefile | 4 ++++
rust/bindings/lib.rs | 1 +
rust/kernel/alloc/allocator_test.rs | 2 +-
rust/kernel/alloc/kvec.rs | 4 ++--
rust/kernel/block/mq/operations.rs | 2 +-
rust/kernel/block/mq/request.rs | 7 ++++---
rust/kernel/device.rs | 5 +++--
rust/kernel/device_id.rs | 2 +-
rust/kernel/devres.rs | 19 ++++++++++---------
rust/kernel/error.rs | 2 +-
rust/kernel/firmware.rs | 2 +-
rust/kernel/fs/file.rs | 2 +-
rust/kernel/io.rs | 18 +++++++++---------
rust/kernel/kunit.rs | 15 +++++++--------
rust/kernel/lib.rs | 5 ++---
rust/kernel/list/impl_list_item_mod.rs | 2 +-
rust/kernel/miscdevice.rs | 2 +-
rust/kernel/of.rs | 6 +++---
rust/kernel/pci.rs | 13 ++++++++-----
rust/kernel/platform.rs | 6 ++++--
rust/kernel/print.rs | 11 +++++------
rust/kernel/rbtree.rs | 23 ++++++++++-------------
rust/kernel/seq_file.rs | 3 ++-
rust/kernel/str.rs | 10 +++++-----
rust/kernel/sync/poll.rs | 2 +-
rust/kernel/workqueue.rs | 12 ++++++------
rust/uapi/lib.rs | 1 +
27 files changed, 95 insertions(+), 86 deletions(-)
---
base-commit: ff64846bee0e7e3e7bc9363ebad3bab42dd27e24
change-id: 20250307-ptr-as-ptr-21b1867fc4d4

Best regards,
--
Tamir Duberstein <tamird@gmail.com>