diff --git a/Cargo.lock b/Cargo.lock
index 264cd4e7..7f256a51 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1463,7 +1463,6 @@ source = "git+https://github.com/os-module/kernel-sync.git#e7e366d8ae91ba6c00870
 dependencies = [
  "cfg-if",
  "lock_api",
- "riscv",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index e34ea202..46501212 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,34 +1,34 @@
-[workspace]
-resolver = "2"
-members = [
-    "kernel",
-    "userlib",
-    "boot",
-    "dep/gmanager",
-    "dep/basemachine",
-    "apps/slint-helper",
-    "apps/cat",
-    "apps/sleep",
-    "apps/todo",
-    "apps/printdemo",
-    "apps/egui",
-    "apps/sysinfo",
-    "apps/init",
-    "apps/ls",
-    "apps/mkdir",
-    "apps/pwd",
-    "apps/shell",
-    "apps/touch",
-    "apps/run_test",
-    "apps/slint",
-    "apps/socket_test",
-    "apps/tests",
-    "apps/memory-game",
-    "apps/print",
-    "apps/final_test",
-]
-
-
-[profile.release]
-#lto = true
-#codegen-units = 1
+[workspace]
+resolver = "2"
+members = [
+    "kernel",
+    "userlib",
+    "boot",
+    "dep/gmanager",
+    "dep/basemachine",
+    "apps/slint-helper",
+    "apps/cat",
+    "apps/sleep",
+    "apps/todo",
+    "apps/printdemo",
+    "apps/egui",
+    "apps/sysinfo",
+    "apps/init",
+    "apps/ls",
+    "apps/mkdir",
+    "apps/pwd",
+    "apps/shell",
+    "apps/touch",
+    "apps/run_test",
+    "apps/slint",
+    "apps/socket_test",
+    "apps/tests",
+    "apps/memory-game",
+    "apps/print",
+    "apps/final_test",
+]
+
+
+[profile.release]
+#lto = true
+#codegen-units = 1
diff --git a/assert/desktop.bmp b/assert/desktop.bmp
deleted file mode 100644
index a754f7a7..00000000
Binary files a/assert/desktop.bmp and /dev/null differ
diff --git a/assert/file.bmp b/assert/file.bmp
deleted file mode 100644
index 4a4e83bb..00000000
Binary files a/assert/file.bmp and /dev/null differ
diff --git a/assert/folder.bmp b/assert/folder.bmp
deleted file mode 100644
index c8384cb7..00000000
Binary files a/assert/folder.bmp and /dev/null differ
diff --git a/assert/mouse.bmp b/assert/mouse.bmp
deleted file mode 100644
index 22a4613c..00000000
Binary files a/assert/mouse.bmp and /dev/null differ
diff --git a/docs/doc/musl.md b/docs/doc/musl.md
new file mode 100644
index 00000000..47722767
--- /dev/null
+++ b/docs/doc/musl.md
@@ -0,0 +1,4 @@
+# 编译 riscv64gc-unknown-linux-musl rust程序
+
+## 提示找不到运行时库的问题
+https://stackoverflow.com/questions/74424444/how-to-build-a-rust-program-for-riscv64gc-unknown-linux-musl
\ No newline at end of file
diff --git a/kernel/Cargo.toml b/kernel/Cargo.toml
index 99f2dc88..a4e8a836 100644
--- a/kernel/Cargo.toml
+++ b/kernel/Cargo.toml
@@ -27,7 +27,7 @@ rslab = { version = "0.2.1", optional = true }
 syscall-table = { git = "https://github.com/os-module/syscall-table.git" }
 plic = { git = "https://github.com/os-module/plic" }
 pager = { git = "https://github.com/os-module/pager", default-features = false, optional = true }
-kernel-sync = { git = "https://github.com/os-module/kernel-sync.git",features = ["lock_api","riscv"] }
+kernel-sync = { git = "https://github.com/os-module/kernel-sync.git"}
 pconst = { git = "https://github.com/os-module/pconst.git", features = [
     "trick",
 ] }
diff --git a/kernel/src/ksync.rs b/kernel/src/ksync.rs
index f912945b..8583dd43 100644
--- a/kernel/src/ksync.rs
+++ b/kernel/src/ksync.rs
@@ -1,7 +1,84 @@
-use kernel_sync::TicketMutexGuard;
+use kernel_sync::{LockAction, ticket::TicketMutexGuard};
+use core::cell::{RefCell, RefMut};
+use crate::arch::{hart_id, interrupt_disable, interrupt_enable, is_interrupt_enable};
+use crate::config::CPU_NUM;
 
-pub type SpinMutex<T> = kernel_sync::SpinMutex<T>;
-pub type TicketMutex<T> = kernel_sync::TicketMutex<T>;
+
+pub type SpinMutex<T> = kernel_sync::spin::SpinMutex<T,KernelLockAction>;
+pub type TicketMutex<T> = kernel_sync::ticket::TicketMutex<T,KernelLockAction>;
 pub type RwLock<T> = kernel_sync::RwLock<T>;
 pub type Mutex<T> = TicketMutex<T>;
-pub type MutexGuard<'a, T> = TicketMutexGuard<'a, T>;
+pub type MutexGuard<'a, T> = TicketMutexGuard<'a, T, KernelLockAction>;
+
+#[derive(Debug, Default, Clone, Copy)]
+#[repr(align(64))]
+pub struct Cpu {
+    pub noff: i32,              // Depth of push_off() nesting.
+    pub interrupt_enable: bool, // Were interrupts enabled before push_off()?
+}
+
+impl Cpu {
+    const fn new() -> Self {
+        Self {
+            noff: 0,
+            interrupt_enable: false,
+        }
+    }
+}
+
+pub struct SafeRefCell<T>(RefCell<T>);
+
+/// # Safety: Only the corresponding cpu will access it.
+unsafe impl<Cpu> Sync for SafeRefCell<Cpu> {}
+
+impl<T> SafeRefCell<T> {
+    const fn new(t: T) -> Self {
+        Self(RefCell::new(t))
+    }
+}
+
+#[allow(clippy::declare_interior_mutable_const)]
+const DEFAULT_CPU: SafeRefCell<Cpu> = SafeRefCell::new(Cpu::new());
+
+static CPUS: [SafeRefCell<Cpu>; CPU_NUM] = [DEFAULT_CPU; CPU_NUM];
+
+pub fn mycpu() -> RefMut<'static, Cpu> {
+    CPUS[hart_id()].0.borrow_mut()
+}
+
+// push_off/pop_off are like intr_off()/intr_on() except that they are matched:
+// it takes two pop_off()s to undo two push_off()s.  Also, if interrupts
+// are initially off, then push_off, pop_off leaves them off.
+pub(crate) fn push_off() {
+    let old = is_interrupt_enable();
+    interrupt_disable();
+    let mut cpu = mycpu();
+    if cpu.noff == 0 {
+        cpu.interrupt_enable = old;
+    }
+    cpu.noff += 1;
+}
+
+pub(crate) fn pop_off() {
+    let mut cpu = mycpu();
+    if is_interrupt_enable() || cpu.noff < 1 {
+        panic!("pop_off");
+    }
+    cpu.noff -= 1;
+    let should_enable = cpu.noff == 0 && cpu.interrupt_enable;
+    drop(cpu);
+    // NOTICE: intr_on() may lead to an immediate inerrupt, so we *MUST* drop(cpu) in advance.
+    if should_enable {
+        interrupt_enable();
+    }
+}
+
+pub struct KernelLockAction;
+impl LockAction for KernelLockAction {
+    fn before_lock() {
+        push_off();
+    }
+    fn after_lock() {
+        pop_off();
+    }
+}