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

From: Andrew Morton
Date: Fri Feb 27 2015 - 18:55:09 EST


On Fri, 27 Feb 2015 15:52:56 -0800 Danesh Petigara <dpetigara@xxxxxxxxxxxx> wrote:

> On 2/27/2015 1:24 PM, Andrew Morton wrote:
> > 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.
> >
>
> Thank you for the feedback. I had no crash logs to show, nevertheless, I
> agree that a sentence describing potential effects of the bug would've
> helped.

What was the reason for adding a cc:stable?
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