diff --git a/api/arceos_posix_api/src/imp/pthread/condvar.rs b/api/arceos_posix_api/src/imp/pthread/condvar.rs
index fc29678cc..1f2bc6aac 100644
--- a/api/arceos_posix_api/src/imp/pthread/condvar.rs
+++ b/api/arceos_posix_api/src/imp/pthread/condvar.rs
@@ -91,6 +91,7 @@ pub unsafe fn sys_pthread_cond_destroy(condvar: *mut ctypes::pthread_cond_t) ->
     })
 }
 
+/// Wait for the condition variable to be signaled or timeout
 pub unsafe fn sys_pthread_cond_timedwait(
     condvar: *mut ctypes::pthread_cond_t,
     mutex: *mut ctypes::pthread_mutex_t,
diff --git a/modules/axtask/src/lib.rs b/modules/axtask/src/lib.rs
index 354e5c938..df314f05c 100644
--- a/modules/axtask/src/lib.rs
+++ b/modules/axtask/src/lib.rs
@@ -51,6 +51,7 @@ cfg_if::cfg_if! {
         #[cfg(feature = "irq")]
         /// load average
         pub mod loadavg;
+        /// specific key-value storage for each task
         pub mod specific;
         /// TODO: if irq is disabled, what value should AVENRUN be?
         /// average run load, same as in linux kernel