diff -Nru libbpf-0.3/debian/changelog libbpf-0.3/debian/changelog
--- libbpf-0.3/debian/changelog	2021-01-10 17:43:30.000000000 +0000
+++ libbpf-0.3/debian/changelog	2021-01-22 12:08:45.000000000 +0000
@@ -1,3 +1,10 @@
+libbpf (0.3-2+rpi1) bullseye-staging; urgency=medium
+
+  [changes brought forward from 0.3-1+rpi1 by Peter Michael Green <plugwash@raspbian.org> at Thu, 07 Jan 2021 03:30:15 +0000]
+  * Disable use of dmb on arm, it's not approprpriate for raspbian.
+
+ -- Raspbian forward porter <root@raspbian.org>  Fri, 22 Jan 2021 12:08:45 +0000
+
 libbpf (0.3-2) unstable; urgency=medium
 
   [ Luca Boccassi ]
diff -Nru libbpf-0.3/debian/patches/dont-use-dmb.patch libbpf-0.3/debian/patches/dont-use-dmb.patch
--- libbpf-0.3/debian/patches/dont-use-dmb.patch	1970-01-01 00:00:00.000000000 +0000
+++ libbpf-0.3/debian/patches/dont-use-dmb.patch	2021-01-22 12:08:45.000000000 +0000
@@ -0,0 +1,14 @@
+Description: Disable use of dmb on arm, it's not approprpriate for raspbian.
+Author: Peter Michael Green <plugwash@raspbian.org>
+
+--- libbpf-0.3.orig/src/libbpf_util.h
++++ libbpf-0.3/src/libbpf_util.h
+@@ -26,7 +26,7 @@ extern "C" {
+ # define libbpf_smp_wmb() asm volatile("dmb ishst" : : : "memory")
+ # define libbpf_smp_mb() asm volatile("dmb ish" : : : "memory")
+ # define libbpf_smp_rwmb() libbpf_smp_mb()
+-#elif defined(__arm__)
++#elif 0
+ /* These are only valid for armv7 and above */
+ # define libbpf_smp_rmb() asm volatile("dmb ish" : : : "memory")
+ # define libbpf_smp_wmb() asm volatile("dmb ishst" : : : "memory")
diff -Nru libbpf-0.3/debian/patches/series libbpf-0.3/debian/patches/series
--- libbpf-0.3/debian/patches/series	1970-01-01 00:00:00.000000000 +0000
+++ libbpf-0.3/debian/patches/series	2021-01-22 12:08:45.000000000 +0000
@@ -0,0 +1 @@
+dont-use-dmb.patch