Use a qualified path instead of renaming parking_lot::RwLock

Author: Zalathar

compiler/rustc_data_structures/src/sync.rs

@@ -142,8 +142,6 @@ impl<T> MTLock<T> {
     }
 }
 
-use parking_lot::RwLock as InnerRwLock;
-
 /// This makes locks panic if they are already held.
 /// It is only useful when you are running in a single thread
 const ERROR_CHECKING: bool = false;
@@ -167,12 +165,12 @@ impl<K: Eq + Hash, V: Eq, S: BuildHasher> HashMapExt<K, V> for HashMap<K, V, S>
 }
 
 #[derive(Debug, Default)]
-pub struct RwLock<T>(InnerRwLock<T>);
+pub struct RwLock<T>(parking_lot::RwLock<T>);
 
 impl<T> RwLock<T> {
     #[inline(always)]
     pub fn new(inner: T) -> Self {
-        RwLock(InnerRwLock::new(inner))
+        RwLock(parking_lot::RwLock::new(inner))
     }
 
     #[inline(always)]