linux-ext4 - Re: [PATCH] ext4: fixup 64-bit divides in linux-3.0 stable backport of upstream fix

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Date:	Sat, 6 Apr 2013 01:31:29 +0200
From:	Christoph Biedl <linux-kernel.bfrz@...chmal.in-ulm.de>
To:	Todd Poynor <toddpoynor@...gle.com>
Cc:	Greg KH <gregkh@...uxfoundation.org>, stable@...r.kernel.org,
	Lingzhu Xiang <lxiang@...hat.com>, linux-ext4@...r.kernel.org
Subject: Re: [PATCH] ext4: fixup 64-bit divides in linux-3.0 stable backport
 of upstream fix

Todd Poynor wrote...

> On Fri, Apr 5, 2013 at 4:01 PM, Greg KH <gregkh@...uxfoundation.org> wrote:
> >
> > On Fri, Apr 05, 2013 at 03:54:23PM -0700, Todd Poynor wrote:
> > > Replace C division operators with div64_u64 for divides introduced in:
> > > commit 503f4bdcc078e7abee273a85ce322de81b18a224
> > > ext4: use atomic64_t for the per-flexbg free_clusters count
> > >
> > > Specific to the linux-3.0 backport of the upstream patch.
> >
> > Why is this specific?  Why is this working differently in 3.0 from 3.4
> > and newer?
> 
> Looks like 3.1 doesn't have this patch.

Just comparing the "ext4: use atomic64_t for the per-flexbg
free_clusters count" patches for 3.0 and 3.4, your fix and git: The
build errors in 3.0.72 your patch fixes originate in find_group_flex
which was removed in v3.1-rc3-44-g4113c4c, hence only 3.0 was
affected.

    Christoph
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