[PATCH v4 0/8] MMU disabling code and kexec fixes

On Tue, 23 Aug 2011, Will Deacon wrote:

Hello,

This is version 4 of the patches originally posted here:

v1: http://lists.infradead.org/pipermail/linux-arm-kernel/2011-June/052157.html
v2: http://lists.infradead.org/pipermail/linux-arm-kernel/2011-June/052559.html
v3: http://lists.infradead.org/pipermail/linux-arm-kernel/2011-June/053252.html

There are many changes since v3. Notably:
	- Support for Thumb-2
	- Based on 3.1-rc3 (now that some of the previous patches have
	  been merged)
	- The reserved stack page now sits below swapper and is reserved
	  by memblock during memory init. This has the advantage of being
	  at a known physical address for a platform, which will be helpful
	  for non-hotplug SMP booting.

Is this really necessary?  Relying on "known physical address" is often 
going to lead us in situations where that physical address get encoded 
outside the kernel proper and then we're stuck with it forever.  This 
would be more "reliable" if the interface would be passed that address 
and if the page was dynamically allocated/freed.


Nicolas