From 36ca35060f519f1cdd363e5638cfa83e1f77e0d1 Mon Sep 17 00:00:00 2001
From: Yifan Wu <shinbokuow@163.com>
Date: Sun, 30 Jun 2024 20:09:43 +0800
Subject: [PATCH] mm: bugfix #133: MapArea::copy_data does not need &mut
 PageTable

---
 os/src/mm/memory_set.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/os/src/mm/memory_set.rs b/os/src/mm/memory_set.rs
index c366b2b50..701b492c5 100644
--- a/os/src/mm/memory_set.rs
+++ b/os/src/mm/memory_set.rs
@@ -75,7 +75,7 @@ impl MemorySet {
     fn push(&mut self, mut map_area: MapArea, data: Option<&[u8]>) {
         map_area.map(&mut self.page_table);
         if let Some(data) = data {
-            map_area.copy_data(&mut self.page_table, data);
+            map_area.copy_data(&self.page_table, data);
         }
         self.areas.push(map_area);
     }
@@ -335,7 +335,7 @@ impl MapArea {
     }
     /// data: start-aligned but maybe with shorter length
     /// assume that all frames were cleared before
-    pub fn copy_data(&mut self, page_table: &mut PageTable, data: &[u8]) {
+    pub fn copy_data(&mut self, page_table: &PageTable, data: &[u8]) {
         assert_eq!(self.map_type, MapType::Framed);
         let mut start: usize = 0;
         let mut current_vpn = self.vpn_range.get_start();