void mnt_unref_fs(struct libmnt_fs *fs)
{
	if (fs) {
		fs->refcount--;
		/*DBG(FS, ul_debugobj(fs, "unref=%d", fs->refcount));*/
		if (fs->refcount <= 0)
			mnt_free_fs(fs);
	}
}
void mnt_unref_fs(struct libmnt_fs *fs)
{
	if (fs) {
		fs->refcount--;
		 
		if (fs->refcount <= 0)
			mnt_free_fs(fs);
	}
}