[PATCH 3/6 resend] statfs: add ST_UNBINDABLE

[Christian Brauner]

Signed-off-by: Christian Brauner <christian.brau...@ubuntu.com>
---
 fs/statfs.c            | 2 ++
 include/linux/statfs.h | 1 +
 2 files changed, 3 insertions(+)

diff --git a/fs/statfs.c b/fs/statfs.c
index 5b2a24f0f263..61b3063d3921 100644
--- a/fs/statfs.c
+++ b/fs/statfs.c
@@ -29,6 +29,8 @@ static int flags_by_mnt(int mnt_flags)
                flags |= ST_NODIRATIME;
        if (mnt_flags & MNT_RELATIME)
                flags |= ST_RELATIME;
+       if (mnt_flags & MNT_UNBINDABLE)
+               flags |= ST_UNBINDABLE;
        return flags;
 }
 
diff --git a/include/linux/statfs.h b/include/linux/statfs.h
index b336c04e793c..e1b84d0388c1 100644
--- a/include/linux/statfs.h
+++ b/include/linux/statfs.h
@@ -40,5 +40,6 @@ struct kstatfs {
 #define ST_NOATIME     (1<<10) /* do not update access times */
 #define ST_NODIRATIME  (1<<11) /* do not update directory access times */
 #define ST_RELATIME    (1<<12) /* update atime relative to mtime/ctime */
+#define ST_UNBINDABLE  (1<<17) /* change to unbindable */
 
 #endif
-- 
2.17.0