Merge pull request #1 from Foundation-Devices/1.66.0-xous-arm-rebase

1.66.0 xous arm rebase

library/std/src/sys/xous/alloc.rs

@@ -49,19 +49,13 @@ mod lock {
             if LOCKED.swap(1, SeqCst) == 0 {
                 return DropLock;
             }
-            xous::syscall::yield_slice();
         }
     }
 
     impl Drop for DropLock {
         fn drop(&mut self) {
             let r = LOCKED.swap(0, SeqCst);
             debug_assert_eq!(r, 1);
-            // this yield_slice() will allow any waiting thread to wake up and
-            // do its thing -- without it, a waiting thread could be starved if
-            // the code continues executing and within the same quanta it grabs
-            // the lock again.
-            xous::syscall::yield_slice();
         }
     }
 }