rust: task: use safe macro

rust/kernel/task.rs

@@ -164,7 +164,7 @@ impl Task {
     /// Returns the given task's pid in the current pid namespace.
     pub fn pid_in_current_ns(&self) -> Pid {
         // SAFETY: Calling `task_active_pid_ns` with the current task is always safe.
-        let namespace = unsafe { bindings::task_active_pid_ns(bindings::get_current()) };
+        let namespace = unsafe { bindings::task_active_pid_ns(current!()) };
         // SAFETY: We know that `self.0.get()` is valid by the type invariant.
         unsafe { bindings::task_tgid_nr_ns(self.0.get(), namespace) }
     }
@@ -176,6 +176,15 @@ impl Task {
         // running.
         unsafe { bindings::wake_up_process(self.0.get()) };
     }
+
+    /// Returns a raw pointer to the underlying C task struct.
+    ///
+    /// # Safety
+    ///
+    /// Callers must ensure that the pointer is not used after `Task` is invalidated.
+    pub unsafe fn as_raw(&self) -> *const bindings::task_struct {
+        self.0.get()
+    }
 }
 
 impl Kuid {