kernel/linux
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ synced 2026-11-10 20:48:12 +00:00
Code Issues Releases Packages Activity
linux/rust/helpers/poll.c

11 lines
247 B
Raw Permalink Normal View History

poll: rust: allow poll_table ptrs to be null It's possible for a poll_table to be null. This can happen if an end-user just wants to know if a resource has events right now without registering a waiter for when events become available. Furthermore, these null pointers should be handled transparently by the API, so we should not change `from_ptr` to return an `Option`. Thus, change `PollTable` to wrap a raw pointer rather than use a reference so that you can pass null. Comments mentioning `struct poll_table` are changed to just `poll_table` since `poll_table` is a typedef. (It's a typedef because it's supposed to be opaque.) Reviewed-by: Benno Lossin <lossin@kernel.org> Signed-off-by: Alice Ryhl <aliceryhl@google.com>
2025-06-23 13:57:27 +00:00
rust: poll: add __rust_helper to helpers This is needed to inline these helpers into Rust code. Signed-off-by: Alice Ryhl <aliceryhl@google.com> Link: https://patch.msgid.link/20251202-define-rust-helper-v1-29-a2e13cbc17a6@google.com Reviewed-by: Gary Guo <gary@garyguo.net> Reviewed-by: Boqun Feng <boqun.feng@gmail.com> Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-12-02 19:37:53 +00:00
poll: rust: allow poll_table ptrs to be null It's possible for a poll_table to be null. This can happen if an end-user just wants to know if a resource has events right now without registering a waiter for when events become available. Furthermore, these null pointers should be handled transparently by the API, so we should not change `from_ptr` to return an `Option`. Thus, change `PollTable` to wrap a raw pointer rather than use a reference so that you can pass null. Comments mentioning `struct poll_table` are changed to just `poll_table` since `poll_table` is a typedef. (It's a typedef because it's supposed to be opaque.) Reviewed-by: Benno Lossin <lossin@kernel.org> Signed-off-by: Alice Ryhl <aliceryhl@google.com>
2025-06-23 13:57:27 +00:00