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Message-ID: <20250406013445.124688-1-fujita.tomonori@gmail.com> Date: Sun, 6 Apr 2025 10:34:40 +0900 From: FUJITA Tomonori <fujita.tomonori@...il.com> To: rust-for-linux@...r.kernel.org Cc: linux-kernel@...r.kernel.org, netdev@...r.kernel.org, andrew@...n.ch, hkallweit1@...il.com, tmgross@...ch.edu, ojeda@...nel.org, alex.gaynor@...il.com, gary@...yguo.net, bjorn3_gh@...tonmail.com, benno.lossin@...ton.me, a.hindborg@...sung.com, aliceryhl@...gle.com, anna-maria@...utronix.de, frederic@...nel.org, tglx@...utronix.de, arnd@...db.de, jstultz@...gle.com, sboyd@...nel.org, mingo@...hat.com, peterz@...radead.org, juri.lelli@...hat.com, vincent.guittot@...aro.org, dietmar.eggemann@....com, rostedt@...dmis.org, bsegall@...gle.com, mgorman@...e.de, vschneid@...hat.com, tgunders@...hat.com, me@...enk.dev, david.laight.linux@...il.com Subject: [PATCH v12 0/5] rust: Add IO polling Add two new types, Instant and Delta, which represent a specific point in time and a span of time, respectively, with Rust version of fsleep(). I dropped patches related with read_poll_timeout() in this version, which we haven't reached agreement on yet. There are other potential uses for the Instant and Delta types, so it's better to upstream them first. Note that I haven't changed the subject to avoid confusion. Unlike the old rust time branch, this adds a wrapper for fsleep() instead of msleep(). fsleep() automatically chooses the best sleep method based on a duration. v12 - drop #1, #6, and #7 patches, which we haven't reached agreement on yet - adjust hrtimer code to use Instance for the removal of Ktime v11: https://lore.kernel.org/lkml/20250220070611.214262-1-fujita.tomonori@gmail.com/ - use file_len arg name in __might_resched_precision() instead of len for clarity - remove unnecessary strlen in __might_resched(); just use a large value for the precision - add more doc and example for read_poll_timeout() - fix read_poll_timeout() to call __might_sleep() only with CONFIG_DEBUG_ATOMIC_SLEEP enabled - call might_sleep() instead of __might_sleep() in read_poll_timeout() to match the C version - Add new sections for the abstractions in MAINTAINERS instead of adding rust files to the existing sections v10: https://lore.kernel.org/lkml/20250207132623.168854-1-fujita.tomonori@gmail.com/ - rebased on rust-next - use Option type for timeout argument for read_poll_timeout() - remove obsoleted comment on read_poll_timeout() v9: https://lore.kernel.org/lkml/20250125101854.112261-1-fujita.tomonori@gmail.com/ - make the might_sleep() changes into as a separate patch - add as_millis() method to Delta for Binder driver - make Delta's as_*() methods const (useful in some use cases) - add Delta::ZERO const; used in fsleep() - fix typos - use intra-doc links - place the #[inline] marker before the documentation - remove Instant's from_raw() method - add Invariants to Instant type - improve Delta's methods documents - fix fsleep() SAFETY comment - improve fsleep() documents - lift T:Copy restriction in read_poll_timeout() - use MutFn for Cond in read_poll_timeout() instead of Fn - fix might_sleep() call in read_poll_timeout() - simplify read_poll_timeout() logic v8: https://lore.kernel.org/lkml/20250116044100.80679-1-fujita.tomonori@gmail.com/ - fix compile warnings v7: https://lore.kernel.org/lkml/20241220061853.2782878-1-fujita.tomonori@gmail.com/ - rebased on rust-next - use crate::ffi instead of core::ffi v6: https://lore.kernel.org/lkml/20241114070234.116329-1-fujita.tomonori@gmail.com/ - use super::Delta in delay.rs - improve the comments - add Delta's is_negative() method - rename processor.rs to cpu.rs for cpu_relax() - add __might_sleep_precision() taking pointer to a string with the length - implement read_poll_timeout as normal function instead of macro v5: https://lore.kernel.org/lkml/20241101010121.69221-1-fujita.tomonori@gmail.com/ - set the range of Delta for fsleep function - update comments v4: https://lore.kernel.org/lkml/20241025033118.44452-1-fujita.tomonori@gmail.com/ - rebase on the tip tree's timers/core - add Instant instead of using Ktime - remove unused basic methods - add Delta as_micros_ceil method - use const fn for Delta from_* methods - add more comments based on the feedback - add a safe wrapper for cpu_relax() - add __might_sleep() macro v3: https://lore.kernel.org/lkml/20241016035214.2229-1-fujita.tomonori@gmail.com/ - Update time::Delta methods (use i64 for everything) - Fix read_poll_timeout to show the proper debug info (file and line) - Move fsleep to rust/kernel/time/delay.rs - Round up delta for fsleep - Access directly ktime_t instead of using ktime APIs - Add Eq and Ord with PartialEq and PartialOrd v2: https://lore.kernel.org/lkml/20241005122531.20298-1-fujita.tomonori@gmail.com/ - Introduce time::Delta instead of core::time::Duration - Add some trait to Ktime for calculating timeout - Use read_poll_timeout in QT2025 driver instead of using fsleep directly v1: https://lore.kernel.org/netdev/20241001112512.4861-1-fujita.tomonori@gmail.com/ FUJITA Tomonori (5): rust: time: Add PartialEq/Eq/PartialOrd/Ord trait to Ktime rust: time: Introduce Delta type rust: time: Introduce Instant type rust: time: Add wrapper for fsleep() function MAINTAINERS: rust: Add a new section for all of the time stuff MAINTAINERS | 11 +- rust/helpers/helpers.c | 1 + rust/helpers/time.c | 8 ++ rust/kernel/time.rs | 165 ++++++++++++++++++++++------ rust/kernel/time/delay.rs | 49 +++++++++ rust/kernel/time/hrtimer.rs | 14 +-- rust/kernel/time/hrtimer/arc.rs | 4 +- rust/kernel/time/hrtimer/pin.rs | 4 +- rust/kernel/time/hrtimer/pin_mut.rs | 4 +- rust/kernel/time/hrtimer/tbox.rs | 4 +- 10 files changed, 210 insertions(+), 54 deletions(-) create mode 100644 rust/helpers/time.c create mode 100644 rust/kernel/time/delay.rs base-commit: a2cc6ff5ec8f91bc463fd3b0c26b61166a07eb11 -- 2.43.0
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