diff --git a/devel/userspace-rcu/DESCR b/devel/userspace-rcu/DESCR
new file mode 100644
index 0000000000000..60fb4095b3b93
--- /dev/null
+++ b/devel/userspace-rcu/DESCR
@@ -0,0 +1,6 @@
+liburcu is a userspace RCU (read-copy-update) library. This data
+synchronization library provides read-side access which scales linearly
+with the number of cores. It does so by allowing multiples copies of a
+given data structure to live at the same time, and by monitoring the
+data structure accesses to detect grace periods after which memory
+reclamation is possible.
diff --git a/devel/userspace-rcu/Makefile b/devel/userspace-rcu/Makefile
new file mode 100644
index 0000000000000..c9b5c5752a9a8
--- /dev/null
+++ b/devel/userspace-rcu/Makefile
@@ -0,0 +1,31 @@
+# $NetBSD: Makefile,v 1.1 2012/09/30 22:06:17 pettai Exp $
+#
+
+DISTNAME=	userspace-rcu-0.7.3
+CATEGORIES=	devel
+MASTER_SITES=	http://lttng.org/files/urcu/
+EXTRACT_SUFX=	.tar.bz2
+
+MAINTAINER=	pettai@NetBSD.org
+HOMEPAGE=	http://lttng.org/urcu
+COMMENT=	Userspace RCU (Read Copy Update)
+LICENSE=	gnu-lgpl-v2.1
+
+PKG_DESTDIR_SUPPORT=	user-destdir
+
+GNU_CONFIGURE=	yes
+USE_LIBTOOL=	yes
+USE_TOOLS+=	gmake pkg-config
+
+# liburcu requires TLS support, thus,
+# only NetBSD-6 or later is supported
+NOT_FOR_PLATFORM=	NetBSD-[0-5]*-*
+
+PKGCONFIG_OVERRIDE+=	liburcu-bp.pc.in
+PKGCONFIG_OVERRIDE+=	liburcu-cds.pc.in
+PKGCONFIG_OVERRIDE+=	liburcu-mb.pc.in
+PKGCONFIG_OVERRIDE+=	liburcu-qsbr.pc.in
+PKGCONFIG_OVERRIDE+=	liburcu-signal.pc.in
+PKGCONFIG_OVERRIDE+=	liburcu.pc.in
+
+.include "../../mk/bsd.pkg.mk"
diff --git a/devel/userspace-rcu/PLIST b/devel/userspace-rcu/PLIST
new file mode 100644
index 0000000000000..901e23b406fd5
--- /dev/null
+++ b/devel/userspace-rcu/PLIST
@@ -0,0 +1,60 @@
+@comment $NetBSD: PLIST,v 1.1 2012/09/30 22:06:17 pettai Exp $
+include/urcu-bp.h
+include/urcu-call-rcu.h
+include/urcu-defer.h
+include/urcu-flavor.h
+include/urcu-pointer.h
+include/urcu-qsbr.h
+include/urcu.h
+include/urcu/arch.h
+include/urcu/arch/generic.h
+include/urcu/cds.h
+include/urcu/compiler.h
+include/urcu/config.h
+include/urcu/futex.h
+include/urcu/hlist.h
+include/urcu/list.h
+include/urcu/map/urcu-bp.h
+include/urcu/map/urcu-qsbr.h
+include/urcu/map/urcu.h
+include/urcu/rcuhlist.h
+include/urcu/rculfhash.h
+include/urcu/rculfqueue.h
+include/urcu/rculfstack.h
+include/urcu/rculist.h
+include/urcu/ref.h
+include/urcu/static/rculfqueue.h
+include/urcu/static/rculfstack.h
+include/urcu/static/urcu-bp.h
+include/urcu/static/urcu-pointer.h
+include/urcu/static/urcu-qsbr.h
+include/urcu/static/urcu.h
+include/urcu/static/wfqueue.h
+include/urcu/static/wfstack.h
+include/urcu/system.h
+include/urcu/tls-compat.h
+include/urcu/uatomic.h
+include/urcu/uatomic/generic.h
+include/urcu/uatomic_arch.h
+include/urcu/urcu-futex.h
+include/urcu/urcu_ref.h
+include/urcu/wfqueue.h
+include/urcu/wfstack.h
+lib/liburcu-bp.la
+lib/liburcu-cds.la
+lib/liburcu-common.la
+lib/liburcu-mb.la
+lib/liburcu-qsbr.la
+lib/liburcu-signal.la
+lib/liburcu.la
+lib/pkgconfig/liburcu-bp.pc
+lib/pkgconfig/liburcu-cds.pc
+lib/pkgconfig/liburcu-mb.pc
+lib/pkgconfig/liburcu-qsbr.pc
+lib/pkgconfig/liburcu-signal.pc
+lib/pkgconfig/liburcu.pc
+share/doc/userspace-rcu/ChangeLog
+share/doc/userspace-rcu/README
+share/doc/userspace-rcu/cds-api.txt
+share/doc/userspace-rcu/rcu-api.txt
+share/doc/userspace-rcu/uatomic-api.txt
diff --git a/devel/userspace-rcu/buildlink3.mk b/devel/userspace-rcu/buildlink3.mk
new file mode 100644
index 0000000000000..a09d12469fb49
--- /dev/null
+++ b/devel/userspace-rcu/buildlink3.mk
@@ -0,0 +1,12 @@
+# $NetBSD: buildlink3.mk,v 1.1 2012/09/30 22:06:17 pettai Exp $
+
+BUILDLINK_TREE+=	userspace-rcu
+
+.if !defined(USERSPACE_RCU_BUILDLINK3_MK)
+USERSPACE_RCU_BUILDLINK3_MK:=
+
+BUILDLINK_API_DEPENDS.userspace-rcu+=	userspace-rcu>=0.7.3
+BUILDLINK_PKGSRCDIR.userspace-rcu?=	../../devel/userspace-rcu
+.endif	# USERSPACE_RCU_BUILDLINK3_MK
+
+BUILDLINK_TREE+=	-userspace-rcu
diff --git a/devel/userspace-rcu/distinfo b/devel/userspace-rcu/distinfo
new file mode 100644
index 0000000000000..8e1db2c70bc58
--- /dev/null
+++ b/devel/userspace-rcu/distinfo
@@ -0,0 +1,5 @@
+$NetBSD: distinfo,v 1.1 2012/09/30 22:06:17 pettai Exp $
+
+SHA1 (userspace-rcu-0.7.3.tar.bz2) = 0585e06068f766c42602b32c20baf241258440ba
+RMD160 (userspace-rcu-0.7.3.tar.bz2) = 96efc29d11339334adda3b8917aa74d2878d03fb
+Size (userspace-rcu-0.7.3.tar.bz2) = 385350 bytes