diff --git a/base/src/rust/ashmem.rs b/base/src/rust/ashmem.rs
index 055885cdfa13db1d3ab6b7cfe4626eb9aad3fbe9..36ff005213dad1254b912b3f20ad78c169088de2 100644
--- a/base/src/rust/ashmem.rs
+++ b/base/src/rust/ashmem.rs
@@ -36,13 +36,6 @@ pub mod ffi {
         include!("commonlibrary/c_utils/base/include/ashmem.h");
 
         // global function
-        /**
-         * Create an ashmem and return its FD.
-         * # Safety
-         * Requires C-style string as parameter to specify the name of Ashmem.
-         */
-        pub unsafe fn AshmemCreate(name: *const c_char, size: usize) -> i32;
-
         /**
          * Create an C++ Ashmem object managed by std::shared_ptr.
          * # Safety
@@ -217,16 +210,4 @@ pub unsafe fn create_ashmem_instance(name: &str, size: i32) -> Option<Ashmem> {
     } else {
         Some(Ashmem::new(c_ashmem_ptr))
     }
-}
-
-/**
- * Create raw ashmem and returns its FD.
- * # Safety
- * Transmits c-style string of `name`.
- */
-#[allow(dead_code)]
-pub unsafe fn ashmem_create(name: &str, size: i32) -> i32 {
-    let c_name = CString::new(name).expect("CString::new Failed!");
-    let name_ptr = c_name.as_ptr();
-    ffi::AshmemCreate(name_ptr, size.try_into().expect("Invalid size."))
 }
\ No newline at end of file
diff --git a/base/test/unittest/rust/rust_utils_ashmem_test.rs b/base/test/unittest/rust/rust_utils_ashmem_test.rs
index b7816522f292dc9b1fcabdda32e1ffdb021facf2..0187a503e5f3e05eabbb47ea89fca876397b7327 100644
--- a/base/test/unittest/rust/rust_utils_ashmem_test.rs
+++ b/base/test/unittest/rust/rust_utils_ashmem_test.rs
@@ -290,7 +290,6 @@ fn test_ashmem_ffi_invalid_006()
     ashmem.CloseAshmem();
 }
 
-
 #[test]
 fn test_ashmem_write_read_001()
 {
@@ -299,6 +298,8 @@ fn test_ashmem_write_read_001()
 
     let ashmem = ashmem.unwrap();
     assert_eq!(ashmem.get_ashmem_size(), MEMORY_SIZE);
+    assert_eq!(ashmem.get_protection(), ashmem::PROT_READ | ashmem::PROT_WRITE | ashmem::PROT_EXEC); // default protection mask.
+    assert_ne!(ashmem.get_ashmem_fd(), -1);
 
     assert!(ashmem.map_ashmem(ashmem::PROT_READ | ashmem::PROT_WRITE));