dm_cache_policy_get_name
const char *policy_name = dm_cache_policy_get_name(policy);
const char *policy_name = dm_cache_policy_get_name(policy);
const char *dm_cache_policy_get_name(struct dm_cache_policy *p);
EXPORT_SYMBOL_GPL(dm_cache_policy_get_name);
DMEMIT("%s ", dm_cache_policy_get_name(cache->policy));