kudos to Matt, author of Hg for this: http://lwn.net/Articles/409864/
full text (it's small enough anyway):
On Wed, 2010-10-13 at 11:32 +0800, firstname.lastname@example.org wrote:
> Dear Matt:
> Recently, I got an oops at pagemap_read(). I've tried to
> searched some patches and found a patch as below link.
Are you from the same HTC mentioned here?
If so, please ask again in 90-120 days. Until then, you're on your own.