[tip: locking/core] rust: revocable: Use safe synchronize_rcu() abstraction

[tip-bot2 for Philipp Stanner]

The following commit has been merged into the locking/core branch of tip:

Commit-ID:     042278f5fa9e681420ab486d6cbf464e26667461
Gitweb:        https://git.kernel.org/tip/042278f5fa9e681420ab486d6cbf464e26667461
Author:        Philipp Stanner <phasta@xxxxxxxxxx>
AuthorDate:    Wed, 24 Jun 2026 17:07:03 +02:00
Committer:     Boqun Feng <boqun@xxxxxxxxxx>
CommitterDate: Tue, 04 Aug 2026 05:52:53 -07:00

rust: revocable: Use safe synchronize_rcu() abstraction

We now have a safe wrapper for the foreign function synchronize_rcu().

Use it in revocable.rs.

Signed-off-by: Philipp Stanner <phasta@xxxxxxxxxx>
Reviewed-by: Onur Özkan <work@xxxxxxxxxxxxx>
Reviewed-by: Danilo Krummrich <dakr@xxxxxxxxxx>
Reviewed-by: Gary Guo <gary@xxxxxxxxxxx>
Signed-off-by: Boqun Feng <boqun@xxxxxxxxxx>
Link: https://patch.msgid.link/20260624150704.1504001-4-phasta@xxxxxxxxxx
---
 rust/kernel/revocable.rs |  9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/rust/kernel/revocable.rs b/rust/kernel/revocable.rs
index 0f4ae67..f539603 100644
--- a/rust/kernel/revocable.rs
+++ b/rust/kernel/revocable.rs
@@ -7,7 +7,11 @@
 
 use pin_init::Wrapper;
 
-use crate::{bindings, prelude::*, sync::rcu, types::Opaque};
+use crate::{
+    prelude::*,
+    sync::rcu,
+    types::Opaque, //
+};
 use core::{
     marker::PhantomData,
     ops::Deref,
@@ -161,8 +165,7 @@ impl<T> Revocable<T> {
 
         if revoke {
             if SYNC {
-                // SAFETY: Just an FFI call, there are no further requirements.
-                unsafe { bindings::synchronize_rcu() };
+                rcu::synchronize_rcu();
             }
 
             // SAFETY: We know `self.data` is valid because only one CPU can succeed the