rem: mount_hash(void *_m, const void *_key, unsigned int range)
add: mount_hash(void *_m, const void *_key, uint32 range)
context: mount_hash(void *_m, const void *_key, unsigned int range){	struct fs_mount *mount = _m;	const mount_id *id = _key;	if (mount)		return mount->id % range;	return *id % range;}