PCACHE_CACHE_FLAGS_GC_PERCENT_MASK
cache_info->flags &= ~PCACHE_CACHE_FLAGS_GC_PERCENT_MASK;
cache_info->flags |= FIELD_PREP(PCACHE_CACHE_FLAGS_GC_PERCENT_MASK, percent);
return FIELD_GET(PCACHE_CACHE_FLAGS_GC_PERCENT_MASK, cache->cache_info.flags);