update to Rust 2018 edition

* specify 2018 edition in the manifest
* changes to fix build with 2018 edition

1 files changed, 1 insertions, 1 deletions

diff --git a/src/tlb.rs b/src/tlb.rs
index ec39e3e..5688ddb 100644
--- a/src/tlb.rs
+++ b/src/tlb.rs
@@ -15,6 +15,6 @@ pub unsafe fn flush(addr: usize) {
 /// This function is unsafe as it causes a general protection fault (GP) if the current privilege
 /// level is not 0.
 pub unsafe fn flush_all() {
-    use controlregs::{cr3, cr3_write};
+    use crate::controlregs::{cr3, cr3_write};
     cr3_write(cr3())
 }