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Diffstat (limited to 'rust/kernel/sync/lock.rs')
| -rw-r--r-- | rust/kernel/sync/lock.rs | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/rust/kernel/sync/lock.rs b/rust/kernel/sync/lock.rs index e82fa5be289c..27202beef90c 100644 --- a/rust/kernel/sync/lock.rs +++ b/rust/kernel/sync/lock.rs @@ -175,6 +175,8 @@ impl<T: ?Sized, B: Backend> Lock<T, B> { /// Tries to acquire the lock. /// /// Returns a guard that can be used to access the data protected by the lock if successful. + // `Option<T>` is not `#[must_use]` even if `T` is, thus the attribute is needed here. + #[must_use = "if unused, the lock will be immediately unlocked"] pub fn try_lock(&self) -> Option<Guard<'_, T, B>> { // SAFETY: The constructor of the type calls `init`, so the existence of the object proves // that `init` was called. |