commit 5b1cebdb771e46cccf10b28ab4e0b9f1088c4674
Author: Brandon Bergren <git@bdragon.rtk0.net>
Date:   Sat Nov 23 16:52:20 2019 -0600

    [DTRACE] Reenable fasttrap on powerpc64.

diff --git a/sys/modules/dtrace/Makefile b/sys/modules/dtrace/Makefile
index 240215deb0a..57a25f55f44 100644
--- a/sys/modules/dtrace/Makefile
+++ b/sys/modules/dtrace/Makefile
@@ -25,6 +25,9 @@ SUBDIR+=	systrace_linux32
     ${MACHINE_ARCH} == "powerpc64"
 SUBDIR+=	systrace_freebsd32
 .endif
+.if ${MACHINE_ARCH} == "powerpc64"
+SUBDIR+=	fasttrap
+.endif
 .if ${MACHINE_CPUARCH} == "aarch64" || \
     ${MACHINE_CPUARCH} == "arm" || \
     ${MACHINE_CPUARCH} == "mips" || \
diff --git a/sys/modules/dtrace/dtraceall/dtraceall.c b/sys/modules/dtrace/dtraceall/dtraceall.c
index 7ac25b85d1c..09bdfbcd6fa 100644
--- a/sys/modules/dtrace/dtraceall/dtraceall.c
+++ b/sys/modules/dtrace/dtraceall/dtraceall.c
@@ -75,7 +75,7 @@ MODULE_DEPEND(dtraceall, dtnfscl, 1, 1, 1);
     defined(__powerpc__) || defined(__riscv)
 MODULE_DEPEND(dtraceall, fbt, 1, 1, 1);
 #endif
-#if defined(__amd64__) || defined(__i386__)
+#if defined(__amd64__) || defined(__i386__) || defined(__powerpc64__)
 MODULE_DEPEND(dtraceall, fasttrap, 1, 1, 1);
 #endif
 MODULE_DEPEND(dtraceall, sdt, 1, 1, 1);