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| author | FUJITA Tomonori <fujita.tomonori@gmail.com> | 2025-11-03 20:29:58 +0900 |
|---|---|---|
| committer | Danilo Krummrich <dakr@kernel.org> | 2025-11-04 14:06:47 +0100 |
| commit | 46f045db5a94cd50b24dc1449bdd444e4473b28b (patch) | |
| tree | 1ac0f529f28908ebdc3920077e94f07849bb645f /rust/kernel/fs/file.rs | |
| parent | ad68b55a9ed0e5ce16508cb10081a73ea8f4bbef (diff) | |
rust: Add read_poll_timeout_atomic function
Add read_poll_timeout_atomic function which polls periodically until a
condition is met, an error occurs, or the attempt limit is reached.
The C's read_poll_timeout_atomic() is used for the similar purpose.
In atomic context the timekeeping infrastructure is unavailable, so
reliable time-based timeouts cannot be implemented. So instead, the
helper accepts a maximum number of attempts and busy-waits (udelay +
cpu_relax) between tries.
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@gmail.com>
Link: https://patch.msgid.link/20251103112958.2961517-3-fujita.tomonori@gmail.com
[ Adjust imports to use "kernel vertical" style. - Danilo ]
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
Diffstat (limited to 'rust/kernel/fs/file.rs')
0 files changed, 0 insertions, 0 deletions