--- /dev/null
+#include "tests.h"
+#include <sys/syscall.h>
+
+#if defined __NR_mlock && defined __NR_munlock
+
+# include <stdio.h>
+# include <unistd.h>
+
+const int size = 1024;
+
+int
+main(void)
+{
+ const char *addr = tail_alloc(size);
+ if (syscall(__NR_mlock, addr, size) == 0) {
+ printf("mlock(%p, %d) = 0\n", addr, size);
+ } else {
+ printf("mlock(%p, %d) = -1 %s (%m)\n",
+ addr, size, errno2name());
+ }
+
+ if (syscall(__NR_munlock, addr, size) == 0) {
+ printf("munlock(%p, %d) = 0\n", addr, size);
+ } else {
+ printf("munlock(%p, %d) = -1 %s (%m)\n",
+ addr, size, errno2name());
+ }
+
+ puts("+++ exited with 0 +++");
+ return 0;
+}
+
+#else
+
+SKIP_MAIN_DEFINED("__NR_mlock && __NR_munlock")
+
+#endif