add MS_NOREMOTELOCK mount flag from linux v4.9

for handling file locking on overlayfs.
see linux commit c568d68341be7030f5647def68851e469b21ca11

diff --git a/include/sys/mount.h b/include/sys/mount.h
index 6674e657754eaf8c3abae4ecca9c9bc8c2528d53..57a89c09ecb1ff8dc6448b6fd6a1405851768028 100644 (file)
--- a/include/sys/mount.h
+++ b/include/sys/mount.h
@@ -47,6 +47,7 @@ extern "C" {
 #define MS_I_VERSION   (1<<23)
 #define MS_STRICTATIME (1<<24)
 #define MS_LAZYTIME    (1<<25)
+#define MS_NOREMOTELOCK (1<<27)
 #define MS_NOSEC       (1<<28)
 #define MS_BORN        (1<<29)
 #define MS_ACTIVE      (1<<30)