use volatile read/writes for checked::Resource.locked

1 files changed, 1 insertions, 0 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 7cd0ff6..a7b6412 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -9,6 +9,7 @@
 #![no_std]
 
 extern crate cortex_m;
+extern crate vcell;
 
 pub mod checked;