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From: Greg KH <greg@kroah.com>
To: Andries.Brouwer@cwi.nl
Cc: alan@lxorguk.ukuu.org.uk, akpm@digeo.com, hch@infradead.org,
	linux-kernel@vger.kernel.org, torvalds@transmeta.com
Subject: Re: [PATCH] register_blkdev
Date: Fri, 7 Mar 2003 16:53:33 -0800	[thread overview]
Message-ID: <20030308005333.GF23071@kroah.com> (raw)
In-Reply-To: <UTC200303080057.h280v0o28591.aeb@smtp.cwi.nl>

On Sat, Mar 08, 2003 at 01:57:00AM +0100, Andries.Brouwer@cwi.nl wrote:
> So my first job is to make sure that no bad minor is ever used
> as array index. Fortunately registration is not by major but
> by dev_t interval, so things tend to be correct automatically.

But register_chrdev() only allocates based on a major.  If a character
driver asks for a major, today it only thinks it has 256 minors, so that
number is usually hard coded in an array.  If a open() happens on a
minor outside that range, the driver will die a horrible death, right?

thanks,

greg k-h

  reply	other threads:[~2003-03-08  0:55 UTC|newest]

Thread overview: 63+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-03-08  0:57 [PATCH] register_blkdev Andries.Brouwer
2003-03-08  0:53 ` Greg KH [this message]
     [not found]   ` <20030308073407.A24272@infradead.org>
2003-03-08 19:29     ` Greg KH
2003-03-08 19:43       ` Christoph Hellwig
2003-03-08 21:26         ` H. Peter Anvin
2003-03-08 21:55           ` Christoph Hellwig
2003-03-08 21:41         ` Joel Becker
2003-03-08 21:52           ` Christoph Hellwig
2003-03-08 22:16             ` Joel Becker
2003-03-08 22:21               ` Christoph Hellwig
2003-03-10 17:31                 ` Joel Becker
2003-03-08 23:37             ` Alan Cox
2003-03-08 22:36               ` Linus Torvalds
2003-03-08 23:56                 ` Alan Cox
2003-03-09  5:08             ` Gerrit Huizenga
2003-03-17 19:21           ` Steven Dake
  -- strict thread matches above, loose matches on Subject: below --
2003-03-08 20:59 Andries.Brouwer
2003-03-08 21:09 ` Christoph Hellwig
2003-03-08 20:26 Andries.Brouwer
2003-03-08 20:31 ` Christoph Hellwig
2003-03-08  1:49 Andries.Brouwer
2003-03-07 19:50 Andries.Brouwer
2003-03-07 19:52 ` Christoph Hellwig
2003-03-07 19:32 Andries.Brouwer
2003-03-07 19:36 ` Christoph Hellwig
2003-03-07 20:30   ` Andrew Morton
2003-03-07 22:12     ` Greg KH
2003-03-07 22:33       ` Andrew Morton
2003-03-07 23:45         ` Greg KH
2003-03-08  1:14           ` Alan Cox
2003-03-08  0:50             ` Greg KH
2003-03-08  1:05               ` Andrew Morton
2003-03-08  1:03                 ` Greg KH
2003-03-08  1:13                 ` Linus Torvalds
2003-03-08 15:09                   ` Alan Cox
2003-03-08 15:53                     ` Christoph Hellwig
2003-03-09  2:02                     ` Chris Wedgwood
2003-03-10  4:46                     ` Oliver Xymoron
2003-03-08 15:11               ` Alan Cox
2003-03-08 19:37                 ` Greg KH
2003-03-08 19:50                   ` Christoph Hellwig
2003-03-08 20:00                     ` Greg KH
2003-03-08 20:23                       ` Christoph Hellwig
2003-03-07 22:55       ` Joel Becker
2003-03-07 22:57         ` Christoph Hellwig
2003-03-07 23:17           ` Randy.Dunlap
2003-03-07 23:38             ` John Cherry
2003-03-07 23:36               ` Christoph Hellwig
2003-03-07 23:46                 ` Andrew Morton
2003-03-07 23:54                   ` Christoph Hellwig
2003-03-08  1:49                     ` Joel Becker
2003-03-08  1:58                       ` Greg KH
2003-03-08  2:15                         ` Joel Becker
2003-03-08  2:18                           ` Linus Torvalds
2003-03-08  2:42                             ` Joel Becker
2003-03-08 19:31                           ` Greg KH
2003-03-08 21:39                             ` Joel Becker
2003-03-08 21:59                               ` Greg KH
2003-03-08  1:04           ` Alan Cox
2003-03-09  4:32         ` Horst von Brand
2003-03-09  5:11           ` Valdis.Kletnieks
2003-03-07 18:49 Andries.Brouwer
2003-03-07 19:06 ` Christoph Hellwig

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