BUG: 1bbbbe7 (x86: Exclude E820_RESERVED regions...) PANIC on boot

Hello all,

I grabbed 3.7-rc2 and found the following on boot:
PANIC: early exception 08 rip 246:10 error 81441d7f cr2 0

A git bisect says that this problems came from:
1bbbbe779aabe1f0768c2bf8f8c0a5583679b54a is the first bad commit commit 1bbbbe779aabe1f0768c2bf8f8c0a5583679b54a

Author: Jacob Shin <[email protected]>
Date:   Thu Oct 20 16:15:26 2011 -0500

x86: Exclude E820_RESERVED regions and memory holes above 4 GB from direct mapping.

On systems with very large memory (1 TB in our case), BIOS may report a reserved region or a hole in the E820 map, even above the 4 GB range. Exclude these from the direct mapping.

The box in question is an Asus motherboard with AMD Phenom(tm) II X6 1100T and 16GB memory. Happy to provide any other information required.

Tom