Re: [to-be-updated] add-a-kernel_address-that-works-for-data-too.patch removed from -mm tree

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On Wed, Mar 10, 2010 at 12:29:42PM -0800, akpm@xxxxxxxxxxxxxxxxxxxx wrote:
> 
> The patch titled
>      add a kernel_address() that works for data too
> has been removed from the -mm tree.  Its filename was
>      add-a-kernel_address-that-works-for-data-too.patch
> 
> This patch was dropped because an updated version will be merged
> 
> The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
> 
> ------------------------------------------------------
> Subject: add a kernel_address() that works for data too
> From: Andi Kleen <andi@xxxxxxxxxxxxxx>
> 
> Add a variant of kernel_text_address() that includes kernel data.
> 
> Assumes kernel is _text ... _end - init section. True everywhere?

No, it is not.  ARM XIP has text in one area, and the data in RAM.

There are two distinct sections:

_text .. _etext
_data .. _end

They both exclude the init sections on ARM, except when XIP is enabled
where the init data appears inside _data .. _end, and is demarked by
__init_begin .. __init_end.

Final point is that we end up with the Dwarf2 unwind tables after the
_etext, but not included in _data - I don't think that matters though.

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:
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