synchronize_rcu() is a frequently used C function which is always safe to be called.
Add a safe abstraction for synchronize_rcu(). Signed-off-by: Philipp Stanner <[email protected]> --- rust/kernel/sync/rcu.rs | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/rust/kernel/sync/rcu.rs b/rust/kernel/sync/rcu.rs index a32bef6e490b..0d438ef31766 100644 --- a/rust/kernel/sync/rcu.rs +++ b/rust/kernel/sync/rcu.rs @@ -50,3 +50,12 @@ fn drop(&mut self) { pub fn read_lock() -> Guard { Guard::new() } + +/// Wait for one RCU grace period. +/// +/// You typically do this to wait for everyone holding a [`Guard`]. +#[inline] +pub fn synchronize_rcu() { + // SAFETY: `synchronize_rcu()` is always safe to be called. It just waits for a grace period. + unsafe { bindings::synchronize_rcu() }; +} -- 2.54.0
