There are at least four bands called White Walls:

1. A Shoegaze band from Melbourne, Australia. They incorporate some elements of Doom and Punk into their style of Shoegaze. They released their debut LP 'White Walls' on November the 14th 2012. Rad dudes http://whitexwallsx.bandcamp.com/.

2. A Punk band from Cincinnati, Ohio (USA)
www.whitewallswhitewalls.blogspot.com

3. A progressive metal outfit from Constanța, Romania - www.myspace.com/whitewallsofficial
Their first album, Mad Man Circus, was released as a free download on October 1st, 2010.

4. Noise / Dark-Ambient from Newcastle, UK.
Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.
Artist biography from last.fm