Index: rt-tests/Makefile
===================================================================
--- rt-tests.orig/Makefile
+++ rt-tests/Makefile
@@ -20,7 +20,11 @@ endif
 UTILS	= src/lib/rt-utils.o
 
 .PHONY: all
-all: $(TARGETS)
+all:  src/lib/getcpu.h $(TARGETS)
+
+src/lib/getcpu.h:
+	@touch $@
+	@grep -q sched_getcpu /usr/include/bits/sched.h && echo "#define HAS_SCHED_GETCPU" >$@; true
 
 cyclictest: src/cyclictest/cyclictest.c $(UTILS)
 	$(CC) $(CFLAGS) -D VERSION_STRING=$(VERSION_STRING) $^ -o $@ $(LIBS)
@@ -59,7 +63,7 @@ CLEANUP += $(if $(wildcard .git), Change
 .PHONY: clean
 clean:
 	for F in $(CLEANUP); do find -type f -name $$F | xargs rm -f; done
-	rm -f hwlatdetect
+	rm -f hwlatdetect src/lib/getcpu.h
 
 .PHONY: distclean
 distclean: clean
Index: rt-tests/src/backfire/sendme.c
===================================================================
--- rt-tests.orig/src/backfire/sendme.c
+++ rt-tests/src/backfire/sendme.c
@@ -30,6 +30,7 @@
 #include <string.h>
 #include <time.h>
 #include "rt-utils.h"
+#include "getcpu.h"
 
 #define _GNU_SOURCE
 #include <utmpx.h>
@@ -38,11 +39,17 @@
 #include <sys/time.h>
 #include <sys/mman.h>
 
+#include <linux/unistd.h>
+
 #define USEC_PER_SEC		1000000
 #define NSEC_PER_SEC		1000000000
 
 #define SIGTEST SIGHUP
 
+#ifndef HAS_SCHED_GETCPU
+#define getcpu(cpu, node, cache) syscall(__NR_getcpu, cpu, node, cache)
+#endif
+
 enum {
 	AFFINITY_UNSPECIFIED,
 	AFFINITY_SPECIFIED,
@@ -197,8 +204,15 @@ int main(int argc, char *argv[])
 
 	if (setaffinity != AFFINITY_UNSPECIFIED) {
 		CPU_ZERO(&mask);
-		if (setaffinity == AFFINITY_USECURRENT)
+		if (setaffinity == AFFINITY_USECURRENT) {
+#ifdef HAS_SCHED_GETCPU
 			affinity = sched_getcpu();
+#else
+			int c, s;
+                        s = getcpu(&c, NULL, NULL);
+		        affinity = (s == -1) ? s : c;
+#endif
+                }
 		CPU_SET(affinity, &mask);
 		if (sched_setaffinity(0, sizeof(mask), &mask) == -1)
 			fprintf(stderr,	"WARNING: Could not set CPU affinity "
Index: rt-tests/src/ptsematest/ptsematest.c
===================================================================
--- rt-tests.orig/src/ptsematest/ptsematest.c
+++ rt-tests/src/ptsematest/ptsematest.c
@@ -35,11 +35,15 @@
 #include <linux/unistd.h>
 #include <utmpx.h>
 #include "rt-utils.h"
+#include "getcpu.h"
 
 #define __USE_GNU
 #include <pthread.h>
 
 #define gettid() syscall(__NR_gettid)
+#ifndef HAS_SCHED_GETCPU
+#define getcpu(cpu, node, cache) syscall(__NR_getcpu, cpu, node, cache)
+#endif
 
 #define USEC_PER_SEC 1000000
 
@@ -108,7 +112,13 @@ void *semathread(void *param)
 			if(par->max_cycles && par->samples >= par->max_cycles)
 				par->shutdown = 1;
 			if (mustgetcpu) {
+#ifdef HAS_SCHED_GETCPU
 				par->cpu = sched_getcpu();
+#else
+				int c, s;
+	                        s = getcpu(&c, NULL, NULL);
+			        par->cpu = (s == -1) ? s : c;
+#endif
 			}
 		} else {
 			/* Receiver */
@@ -150,7 +160,13 @@ void *semathread(void *param)
 			if (par->max_cycles && par->samples >= par->max_cycles)
 				par->shutdown = 1;
 			if (mustgetcpu) {
+#ifdef HAS_SCHED_GETCPU
 				par->cpu = sched_getcpu();
+#else
+				int c, s;
+	                        s = getcpu(&c, NULL, NULL);
+			        par->cpu = (s == -1) ? s : c;
+#endif
 		        }
 			nanosleep(&par->delay, NULL);
 			pthread_mutex_unlock(&syncmutex[par->num]);
Index: rt-tests/src/sigwaittest/sigwaittest.c
===================================================================
--- rt-tests.orig/src/sigwaittest/sigwaittest.c
+++ rt-tests/src/sigwaittest/sigwaittest.c
@@ -37,11 +37,15 @@
 #include <linux/unistd.h>
 #include <utmpx.h>
 #include "rt-utils.h"
+#include "getcpu.h"
 
 #define __USE_GNU
 #include <pthread.h>
 
 #define gettid() syscall(__NR_gettid)
+#ifndef HAS_SCHED_GETCPU
+#define getcpu(cpu, node, cache) syscall(__NR_getcpu, cpu, node, cache)
+#endif
 
 #define USEC_PER_SEC 1000000
 
@@ -139,7 +143,13 @@ void *semathread(void *param)
 				par->shutdown = 1;
 
 			if (mustgetcpu) {
+#ifdef HAS_SCHED_GETCPU
 				par->cpu = sched_getcpu();
+#else
+				int c, s;
+	                        s = getcpu(&c, NULL, NULL);
+			        par->cpu = (s == -1) ? s : c;
+#endif
 			}
 			sigwait(&sigset, &sig);
 		} else {
@@ -163,7 +173,13 @@ void *semathread(void *param)
 				par->shutdown = 1;
 
 			if (mustgetcpu) {
+#ifdef HAS_SCHED_GETCPU
 				par->cpu = sched_getcpu();
+#else
+				int c, s;
+	                        s = getcpu(&c, NULL, NULL);
+			        par->cpu = (s == -1) ? s : c;
+#endif
 		        }
 			/*
 			 * Latency is the time spent between sending and
Index: rt-tests/src/svsematest/svsematest.c
===================================================================
--- rt-tests.orig/src/svsematest/svsematest.c
+++ rt-tests/src/svsematest/svsematest.c
@@ -42,8 +42,7 @@
 #include <sys/time.h>
 #include <sys/mman.h>
 #include "rt-utils.h"