diff --git a/rust/kernel/sync/completion.rs b/rust/kernel/sync/completion.rs
index c50012a940a3..35ff049ff078 100644
--- a/rust/kernel/sync/completion.rs
+++ b/rust/kernel/sync/completion.rs
@@ -94,6 +94,7 @@ fn as_raw(&self) -> *mut bindings::completion {
     ///
     /// This method wakes up all tasks waiting on this completion; after this operation the
     /// completion is permanently done, i.e. signals all current and future waiters.
+    #[inline]
     pub fn complete_all(&self) {
         // SAFETY: `self.as_raw()` is a pointer to a valid `struct completion`.
         unsafe { bindings::complete_all(self.as_raw()) };
@@ -105,6 +106,7 @@ pub fn complete_all(&self) {
     /// timeout.
     ///
     /// See also [`Completion::complete_all`].
+    #[inline]
     pub fn wait_for_completion(&self) {
         // SAFETY: `self.as_raw()` is a pointer to a valid `struct completion`.
         unsafe { bindings::wait_for_completion(self.as_raw()) };