std: Move NativeMutex from &mut self to &self

The proper usage of shared types is now sharing through `&self` rather than
`&mut self` because the mutable version will provide stronger guarantees (no
aliasing on *any* thread).

1 files changed, 2 insertions, 2 deletions

diff --git a/src/libstd/rt/bookkeeping.rs b/src/libstd/rt/bookkeeping.rs
index 5851a6a39c6..932cd7af033 100644
--- a/src/libstd/rt/bookkeeping.rs
+++ b/src/libstd/rt/bookkeeping.rs
@@ -34,7 +34,7 @@ pub fn increment() {
 pub fn decrement() {
     unsafe {
         if TASK_COUNT.fetch_sub(1, atomics::SeqCst) == 1 {
-            let mut guard = TASK_LOCK.lock();
+            let guard = TASK_LOCK.lock();
             guard.signal();
         }
     }
@@ -44,7 +44,7 @@ pub fn decrement() {
 /// the entry points of native programs
 pub fn wait_for_other_tasks() {
     unsafe {
-        let mut guard = TASK_LOCK.lock();
+        let guard = TASK_LOCK.lock();
         while TASK_COUNT.load(atomics::SeqCst) > 0 {
             guard.wait();
         }