Index: uspace/lib/c/include/barrier.h
===================================================================
--- uspace/lib/c/include/barrier.h	(revision 3875f1064135338c90e634c95c82359a59d27007)
+++ uspace/lib/c/include/barrier.h	(revision b9a272563e38eea07dab1ea8d97ee76936365f1a)
@@ -38,6 +38,4 @@
 #include <stdatomic.h>
 
-extern void smp_memory_barrier(void);
-
 static inline void compiler_barrier(void)
 {
Index: uspace/lib/c/include/rcu.h
===================================================================
--- uspace/lib/c/include/rcu.h	(revision 3875f1064135338c90e634c95c82359a59d27007)
+++ 	(revision )
@@ -1,106 +1,0 @@
-/*
- * Copyright (c) 2012 Adam Hraska
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * - Redistributions of source code must retain the above copyright
- *   notice, this list of conditions and the following disclaimer.
- * - Redistributions in binary form must reproduce the above copyright
- *   notice, this list of conditions and the following disclaimer in the
- *   documentation and/or other materials provided with the distribution.
- * - The name of the author may not be used to endorse or promote products
- *   derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-/** @addtogroup libc
- * @{
- */
-/**
- * @file
- */
-
-#ifndef LIBURCU_RCU_H_
-#define LIBURCU_RCU_H_
-
-#include <barrier.h>
-#include <stdbool.h>
-
-/** Use to assign a pointer to newly initialized data to a rcu reader
- * accessible pointer.
- *
- * Example:
- * @code
- * typedef struct exam {
- *     struct exam *next;
- *     int grade;
- * } exam_t;
- *
- * exam_t *exam_list;
- * // ..
- *
- * // Insert at the beginning of the list.
- * exam_t *my_exam = malloc(sizeof(exam_t));
- * my_exam->grade = 5;
- * my_exam->next = exam_list;
- * rcu_assign(exam_list, my_exam);
- *
- * // Changes properly propagate. Every reader either sees
- * // the old version of exam_list or the new version with
- * // the fully initialized my_exam.
- * rcu_synchronize();
- * // Now we can be sure every reader sees my_exam.
- *
- * @endcode
- */
-#define rcu_assign(ptr, value) \
-	do { \
-		memory_barrier(); \
-		(ptr) = (value); \
-	} while (0)
-
-/** Use to access RCU protected data in a reader section.
- *
- * Example:
- * @code
- * exam_t *exam_list;
- * // ...
- *
- * rcu_read_lock();
- * exam_t *first_exam = rcu_access(exam_list);
- * // We can now safely use first_exam, it won't change
- * // under us while we're using it.
- *
- * // ..
- * rcu_read_unlock();
- * @endcode
- */
-#define rcu_access(ptr) ACCESS_ONCE(ptr)
-
-extern void rcu_register_fibril(void);
-extern void rcu_deregister_fibril(void);
-
-extern void rcu_read_lock(void);
-extern void rcu_read_unlock(void);
-
-extern bool rcu_read_locked(void);
-
-extern void rcu_synchronize(void);
-
-#endif
-
-/** @}
- */