commit 8f316871901ec2f54b5ef66416303ef5e87f1226
Author: Serhei Makarov <smakarov@redhat.com>
Date:   Fri Sep 14 14:15:05 2018 -0400

    update man/stap.1.in with a note that stapbpf(8) is only present on x86_64

diff --git a/man/stap.1.in b/man/stap.1.in
index 4db25479f..a0f0d5814 100644
--- a/man/stap.1.in
+++ b/man/stap.1.in
@@ -2538,7 +2538,7 @@ Filter (eBPF) programs instead of a kernel module. eBPF programs are verified
 by the kernel for safety and are executed by an in-kernel virtual machine.
 This runtime is in an early stage of development and currently lacks support
 for a number of features available in the default runtime. Please see the
-\fIstapbpf\fR(8) man page for more information.
+\fIstapbpf\fR(8) man page for more information (only on x86_64 systems).
 
 .SH EXIT STATUS