diff --git a/rust/kernel/i2c.rs b/rust/kernel/i2c.rs
index dd9271af5eb8..c4002e293a73 100644
--- a/rust/kernel/i2c.rs
+++ b/rust/kernel/i2c.rs
@@ -404,6 +404,7 @@ pub fn index(&self) -> i32 {
     }
 
     /// Gets pointer to an `i2c_adapter` by index.
+    #[inline]
     pub fn get(index: i32) -> Result<ARef<Self>> {
         // SAFETY: `index` must refer to a valid I2C adapter; the kernel
         // guarantees that `i2c_get_adapter(index)` returns either a valid
@@ -425,11 +426,13 @@ pub fn get(index: i32) -> Result<ARef<Self>> {
 
 // SAFETY: Instances of `I2cAdapter` are always reference-counted.
 unsafe impl AlwaysRefCounted for I2cAdapter {
+    #[inline]
     fn inc_ref(&self) {
         // SAFETY: The existence of a shared reference guarantees that the refcount is non-zero.
         unsafe { bindings::i2c_get_adapter(self.index()) };
     }
 
+    #[inline]
     unsafe fn dec_ref(obj: NonNull<Self>) {
         // SAFETY: The safety requirements guarantee that the refcount is non-zero.
         unsafe { bindings::i2c_put_adapter(obj.as_ref().as_raw()) }