Index: libcfa/src/concurrency/locks.hfa
===================================================================
--- libcfa/src/concurrency/locks.hfa	(revision eaf269d21f42f861fd9f29749c414742326bf919)
+++ libcfa/src/concurrency/locks.hfa	(revision 6fafda8b82ee096d785c1ff4fba1f1abe4f14324)
@@ -177,4 +177,5 @@
 };
 
+static inline void ?{}(fast_lock & this) __attribute__((deprecated("use linear_backoff_then_block_lock instead")));
 static inline void ?{}(fast_lock & this) { this.owner = 0p; }
 
@@ -184,5 +185,5 @@
 }
 
-static inline void lock( fast_lock & this ) __attribute__((artificial));
+static inline void lock( fast_lock & this ) __attribute__((deprecated("use linear_backoff_then_block_lock instead"), artificial));
 static inline void lock( fast_lock & this ) {
 	thread$ * thrd = active_thread();
@@ -195,5 +196,5 @@
 }
 
-static inline bool try_lock( fast_lock & this ) __attribute__((artificial));
+static inline bool try_lock( fast_lock & this ) __attribute__((deprecated("use linear_backoff_then_block_lock instead"), artificial));
 static inline bool try_lock ( fast_lock & this ) {
 	thread$ * thrd = active_thread();
@@ -202,5 +203,5 @@
 }
 
-static inline thread$ * unlock( fast_lock & this ) __attribute__((artificial));
+static inline thread$ * unlock( fast_lock & this ) __attribute__((deprecated("use linear_backoff_then_block_lock instead"), artificial));
 static inline thread$ * unlock( fast_lock & this ) {
 	/* paranoid */ verify(active_thread() == this.owner);