Index: kernel/generic/include/proc/thread.h
===================================================================
--- kernel/generic/include/proc/thread.h	(revision 515f1b18a4a380af6a2feb75e9d0349bdddfb01c)
+++ kernel/generic/include/proc/thread.h	(revision dfa4be625ce02c0a9d62197b2b62b4c8d6043bf3)
@@ -99,10 +99,4 @@
 	atomic_time_stat_t kcycles;
 
-	/** Lock protecting thread structure.
-	 *
-	 * Protects the whole thread structure except fields listed above.
-	 */
-	IRQ_SPINLOCK_DECLARE(lock);
-
 	/** Architecture-specific data. */
 	thread_arch_t arch;