On Fri, 8 Jun 2012, Ben Hutchings wrote:

3.2-stable review patch.  If anyone has any objections, please let me know.

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From: Minchan Kim <minchan@kernel.org>

commit db1aecafef58b5dda39c4228debe2c845e4a27ab upstream.

vmap_area->private is void* but we don't use the field for various purpose
but use only for vm_struct.  So change it to a vm_struct* with naming to
improve for readability and type checking.

Signed-off-by: Minchan Kim <minchan@kernel.org>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ben Hutchings <redacted>

I'm not sure this is stable material and it wasn't annotated as such when 
it was commited, why should someone need to upgrade their 3.2 for a patch 
like this?