ZPOOL_MM_RO       421 mm/zsmalloc.c  	case ZPOOL_MM_RO:
ZPOOL_MM_RO       857 mm/zswap.c     	zhdr = zpool_map_handle(pool, handle, ZPOOL_MM_RO);
ZPOOL_MM_RO      1158 mm/zswap.c     	src = zpool_map_handle(entry->pool->zpool, entry->handle, ZPOOL_MM_RO);