[PATCH 6/6 resend] statfs: add ST_PRIVATE

[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 35ad0402c9a3..899e899ee84c 100644
--- a/fs/statfs.c
+++ b/fs/statfs.c
@@ -58,6 +58,8 @@ static int calculate_f_flags(struct vfsmount *mnt)
 
        if (IS_MNT_SLAVE(real_mount(mnt)))
                flags |= ST_SLAVE;
+       else if (!(flags & ST_SHARED))
+               flags |= ST_PRIVATE;
 
        return flags;
 }
diff --git a/include/linux/statfs.h b/include/linux/statfs.h
index 048127effaad..663fa5498a7d 100644
--- a/include/linux/statfs.h
+++ b/include/linux/statfs.h
@@ -41,6 +41,7 @@ struct kstatfs {
 #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 */
+#define ST_PRIVATE     (1<<18) /* change to private */
 #define ST_SLAVE       (1<<19) /* change to slave */
 #define ST_SHARED      (1<<20) /* change to shared */
 
-- 
2.17.0