linux-kernel - Re: btrfs zero divide

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Date:	Wed, 14 Aug 2013 11:07:46 -0700
From:	Joe Perches <joe@...ches.com>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:	Zach Brown <zab@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andreas Schwab <schwab@...ux-m68k.org>,
	Josef Bacik <jbacik@...ionio.com>,
	Thorsten Glaser <tg@...bsd.de>,
	Debian GNU/Linux m68k <debian-68k@...ts.debian.org>,
	linux-btrfs@...r.kernel.org,
	Linux Kernel Development <linux-kernel@...r.kernel.org>,
	David Woodhouse <David.Woodhouse@...el.com>,
	Chris Mason <chris.mason@...ionio.com>,
	scsi <linux-scsi@...r.kernel.org>
Subject: Re: btrfs zero divide

On Wed, 2013-08-14 at 10:56 +0200, Geert Uytterhoeven wrote:
> These bring in the 64-bit divisor from somewhere else, so they're less
> trivial to fix.

Using div64_u64 or div64_s64 could fix it.
Maybe that could be added to do_div too.

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