OS: 9334.0.0 caroline dev channel test

Hit this running autotests on my device: 
[   40.713012] zram: 2057 (metrics_daemon) Attribute compr_data_size (and others) will be removed. See zram documentation.

Luigi: Filing in case this is worthy of you take a look, apologies if it isn't.

Seems to come from:
https://cs.corp.google.com/chromeos_public/src/third_party/kernel/v4.4/drivers/block/zram/zram_drv.c?type=cs&q=%22See+zram+documentation%22+package:chromeos_public&l=52