MNT_SHARED         14 fs/pnode.h     #define IS_MNT_SHARED(mnt) (mnt->mnt_flags & MNT_SHARED)
MNT_SHARED         17 fs/pnode.h     #define CLEAR_MNT_SHARED(mnt) (mnt->mnt_flags &= ~MNT_SHARED)
MNT_SHARED         30 fs/pnode.h     	mnt->mnt_flags |= MNT_SHARED;