selftests: exit 1 on failure

In case this ever gets scripted, it should return 0 on success and 1 on
failure.  Parsing the output should be left to meatbags.
Signed-off-by: Joern Engel <joern@logfs.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

tools/testing/selftests/vm/Makefile

@@ -8,7 +8,7 @@ all: hugepage-mmap hugepage-shm  map_hugetlb thuge-gen
 	$(CC) $(CFLAGS) -o $@ $^
 
 run_tests: all
-	@/bin/sh ./run_vmtests || echo "vmtests: [FAIL]"
+	@/bin/sh ./run_vmtests || (echo "vmtests: [FAIL]"; exit 1)
 
 clean:
 	$(RM) hugepage-mmap hugepage-shm  map_hugetlb

tools/testing/selftests/vm/run_vmtests

@@ -4,6 +4,7 @@
 #we need 256M, below is the size in kB
 needmem=262144
 mnt=./huge
+exitcode=0
 
 #get pagesize and freepages from /proc/meminfo
 while read name size unit; do
@@ -41,6 +42,7 @@ echo "--------------------"
 ./hugepage-mmap
 if [ $? -ne 0 ]; then
 	echo "[FAIL]"
+	exitcode=1
 else
 	echo "[PASS]"
 fi
@@ -55,6 +57,7 @@ echo "--------------------"
 ./hugepage-shm
 if [ $? -ne 0 ]; then
 	echo "[FAIL]"
+	exitcode=1
 else
 	echo "[PASS]"
 fi
@@ -67,6 +70,7 @@ echo "--------------------"
 ./map_hugetlb
 if [ $? -ne 0 ]; then
 	echo "[FAIL]"
+	exitcode=1
 else
 	echo "[PASS]"
 fi
@@ -75,3 +79,4 @@ fi
 umount $mnt
 rm -rf $mnt
 echo $nr_hugepgs > /proc/sys/vm/nr_hugepages
+exit $exitcode