diff --git a/modules/axtask/src/lib.rs b/modules/axtask/src/lib.rs
index 91dff6e5d..8a6e1de3f 100644
--- a/modules/axtask/src/lib.rs
+++ b/modules/axtask/src/lib.rs
@@ -48,6 +48,7 @@ cfg_if::cfg_if! {
         mod task;
         mod api;
         mod wait_queue;
+        /// load average
         pub mod loadavg;
 
         #[cfg(feature = "irq")]
diff --git a/modules/axtask/src/loadavg.rs b/modules/axtask/src/loadavg.rs
index a4ddd9998..4caa65558 100644
--- a/modules/axtask/src/loadavg.rs
+++ b/modules/axtask/src/loadavg.rs
@@ -32,6 +32,7 @@ static mut LAST_UPDATE: AtomicU64 = AtomicU64::new(0);
 // TODO: if irq is disabled, what value should AVENRUN be?
 static mut AVENRUN: [u64; 3] = [0, 0, 0];
 
+/// Get the load average
 pub fn get_avenrun(loads: &mut [u64; 3]) {
     for i in 0..3 {
         unsafe {