From: Andreas Dilger <adilger@turbolabs.com>
To: Russ Weight <rweight@us.ibm.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: bdevname(), cdevname(), kdevname() - static buffers
Date: Fri, 2 Nov 2001 12:03:25 -0700 [thread overview]
Message-ID: <20011102120325.K746@lynx.no> (raw)
In-Reply-To: <20011102104211.A1279@us.ibm.com>
In-Reply-To: <20011102104211.A1279@us.ibm.com>; from rweight@us.ibm.com on Fri, Nov 02, 2001 at 10:42:11AM -0800
On Nov 02, 2001 10:42 -0800, Russ Weight wrote:
> I was looking at the usage of bdevname(), cdevname(), and kdevname(),
> and noticed that they each return a pointer to a static buffer.
> This buffer contains a formatted device name, which is typically
> printed immediately following the call. However, I don't see any
> explicit lock protection for these buffers.
>
> For SMP systems, is there something implicit in their use that
> prevents a race on these buffers? Has anyone seen garbled device
> names being printed (which might be attributed to a race)?
I think the general usage of these is only for informational needs, so
if there is a rare race it is not worth fixing.
Cheers, Andreas
--
Andreas Dilger
http://sourceforge.net/projects/ext2resize/
http://www-mddsp.enel.ucalgary.ca/People/adilger/
prev parent reply other threads:[~2001-11-02 19:09 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-11-02 18:42 bdevname(), cdevname(), kdevname() - static buffers Russ Weight
2001-11-02 18:59 ` Alan Cox
2001-11-02 19:03 ` Andreas Dilger [this message]
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