Re: [PATCH v2] mm: cma: fix CMA aligned offset calculation

[Andrew Morton]

On Tue, 24 Feb 2015 15:39:45 -0800 Danesh Petigara <dpetigara@xxxxxxxxxxxx> wrote:

> The CMA aligned offset calculation is incorrect for
> non-zero order_per_bit values.
> 
> For example, if cma->order_per_bit=1, cma->base_pfn=
> 0x2f800000 and align_order=12, the function returns
> a value of 0x17c00 instead of 0x400.
> 
> This patch fixes the CMA aligned offset calculation.

When fixing a bug please always describe the end-user visible effects
of that bug.

Without that information others are unable to understand why you are
recommending a -stable backport.

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