Hi Linus, Peter,

> I don't know if it's just me, but this merge window had more "Uhhuh"
> moments than I'm used to. I stopped merging a couple of times, because
> we had bugs that looked really scary, but thankfully each time people
> were on them like paparazzi on Justin Bieber. Special thanks to Peter,
> Ted and Rafael (and the people who reported the bugs too!) for being
> so responsive. It could have been so much worse.

Or not. ;-) This commit breaks boot on my MacBookAir3,1:

commit 8d57470d8f859635deffe3919d7d4867b488b85a
Author: Yinghai Lu <yinghai@kernel.org>
Date:   Fri Nov 16 19:38:58 2012 -0800

    x86, mm: setup page table in top-down

    Get pgt_buf early from BRK, and use it to map PMD_SIZE from top at first.
    Then use mapped pages to map more ranges below, and keep looping until
    all pages get mapped.

Being a 64-bit apple-EFI machine, it probably runs through an obscure
path in this patch. I wish I had more vital information, but I get the
white screen of death, so not much to go on so far.

Henrik