Make {Mutex, Condvar, RwLock}::new() const.

2 files changed, 2 insertions, 2 deletions

diff --git a/library/std/src/sys_common/mutex.rs b/library/std/src/sys_common/mutex.rs
index daba9c3f2b6..81eefa1133f 100644
--- a/library/std/src/sys_common/mutex.rs
+++ b/library/std/src/sys_common/mutex.rs
@@ -62,7 +62,7 @@ unsafe impl Sync for MovableMutex {}
 impl MovableMutex {
     /// Creates a new mutex.
     #[inline]
-    pub fn new() -> Self {
+    pub const fn new() -> Self {
         Self(imp::MovableMutex::new())
     }
 
diff --git a/library/std/src/sys_common/rwlock.rs b/library/std/src/sys_common/rwlock.rs
index b4550747092..265cebfdc3e 100644
--- a/library/std/src/sys_common/rwlock.rs
+++ b/library/std/src/sys_common/rwlock.rs
@@ -75,7 +75,7 @@ pub struct MovableRwLock(imp::MovableRwLock);
 impl MovableRwLock {
     /// Creates a new reader-writer lock for use.
     #[inline]
-    pub fn new() -> Self {
+    pub const fn new() -> Self {
         Self(imp::MovableRwLock::new())
     }