upper_sb          256 fs/overlayfs/super.c 	struct super_block *upper_sb;
upper_sb          273 fs/overlayfs/super.c 	upper_sb = ofs->upper_mnt->mnt_sb;
upper_sb          275 fs/overlayfs/super.c 	down_read(&upper_sb->s_umount);
upper_sb          276 fs/overlayfs/super.c 	ret = sync_filesystem(upper_sb);
upper_sb          277 fs/overlayfs/super.c 	up_read(&upper_sb->s_umount);