Here is an incremental patch [hopefully] with your concerns addressed.
Note that the arch/ppc/boot code is not kernel code and only exists for a
short period of time before execution jumps to the kernel.
Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>