linux-kernel - Re: [PATCH 0/10] use safer test on the result of find_first_zero

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Message-ID: <alpine.DEB.2.10.1406041137270.2441@hadrien>
Date:	Wed, 4 Jun 2014 11:38:13 +0200 (CEST)
From:	Julia Lawall <julia.lawall@...6.fr>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
cc:	Julia Lawall <Julia.Lawall@...6.fr>,
	linux-rdma <linux-rdma@...r.kernel.org>,
	"kernel-janitors@...r.kernel.org" <kernel-janitors@...r.kernel.org>,
	Linux Fbdev development list <linux-fbdev@...r.kernel.org>,
	Linux-sh list <linux-sh@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	ath10k@...ts.infradead.org,
	linux-wireless <linux-wireless@...r.kernel.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	driverdevel <devel@...verdev.osuosl.org>, iss_storagedev@...com,
	scsi <linux-scsi@...r.kernel.org>,
	linux-s390 <linux-s390@...r.kernel.org>,
	adi-buildroot-devel@...ts.sourceforge.net
Subject: Re: [PATCH 0/10] use safer test on the result of
 find_first_zero_bit



On Wed, 4 Jun 2014, Geert Uytterhoeven wrote:

> Hi Julia,
>
> On Wed, Jun 4, 2014 at 11:07 AM, Julia Lawall <Julia.Lawall@...6.fr> wrote:
> > Find_first_zero_bit considers BITS_PER_LONG bits at a time, and thus may
> > return a larger number than the maximum position argument if that position
> > is not a multiple of BITS_PER_LONG.
>
> Shouldn't this be fixed in find_first_zero_bit() instead?

OK, I could do that as well.  Most of the callers currently test with >=.
Should they be left as is, or changed to use ==?

julia
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