selftest: split mlock2_ funcs into separate mlock2.h

[cascardo/linux.git] / tools / testing / selftests / vm / mlock2.h

diff --git a/tools/testing/selftests/vm/mlock2.h b/tools/testing/selftests/vm/mlock2.h
new file mode 100644 (file)
index 0000000..b9c6d9f
--- /dev/null
+++ b/tools/testing/selftests/vm/mlock2.h
@@ -0,0 +1,20 @@
+#include <syscall.h>
+#include <errno.h>
+
+#ifndef MLOCK_ONFAULT
+#define MLOCK_ONFAULT 1
+#endif
+
+#ifndef MCL_ONFAULT
+#define MCL_ONFAULT (MCL_FUTURE << 1)
+#endif
+
+static int mlock2_(void *start, size_t len, int flags)
+{
+#ifdef __NR_mlock2
+       return syscall(__NR_mlock2, start, len, flags);
+#else
+       errno = ENOSYS;
+       return -1;
+#endif
+}