Re: [patch] mm: nobootmem: fix sign extend problem in__free_pages_memory()

[Andrew Morton]

On Mon, 7 May 2012 14:32:03 -0500
Russ Anderson <rja@xxxxxxx> wrote:

> Systems with 8 TBytes of memory or greater can hit a problem 
> where only the the first 8 TB of memory shows up.

erk.

>  This is
> due to "int i" being smaller than "unsigned long start_aligned",
> causing the high bits to be dropped.
> 
> The fix is to change i to unsigned long to match start_aligned
> and end_aligned.
> 
> Thanks to Jack Steiner (steiner@xxxxxxx) for assistance tracking
> this down.
> 

I added the Cc: <stable@xxxxxxxxxxxxxxx> to this.  The fix is small and
safe and someone might want to run older kernels on such a machine.

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