From: Brian Gerst <brgerst@gmail.com>
Date: Mon, 19 Jan 2009 03:21:28 +0000 (+0900)
Subject: x86: move stack_canary into irq_stack
X-Git-Tag: v2.6.30-rc1~2^2~50^2~65^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=947e76cdc34c782fc947313d4331380686eebbad;p=pandora-kernel.git

x86: move stack_canary into irq_stack

Impact: x86_64 percpu area layout change, irq_stack now at the beginning

Now that the PDA is empty except for the stack canary, it can be removed.
The irqstack is moved to the start of the per-cpu section.  If the stack
protector is enabled, the canary overlaps the bottom 48 bytes of the irqstack.

tj: * updated subject
    * dropped asm relocation of irq_stack_ptr
    * updated comments a bit
    * rebased on top of stack canary changes

Signed-off-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
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