linux-kernel - Re: [PATCH] block: add documentation for register

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Message-ID: <20090220071217.GP29783@kernel.dk>
Date:	Fri, 20 Feb 2009 08:12:18 +0100
From:	Jens Axboe <jens.axboe@...cle.com>
To:	Németh Márton <nm127@...email.hu>
Cc:	Greg Kroah-Hartman <gregkh@...e.de>,
	LKML <linux-kernel@...r.kernel.org>,
	Al Viro <viro@...iv.linux.org.uk>,
	ltp-list@...ts.sourceforge.net
Subject: Re: [PATCH] block: add documentation for register_blkdev()

On Fri, Feb 20 2009, Németh Márton wrote:
> From: Márton Németh <nm127@...email.hu>
> 
> Add documentation for register_blkdev() function and for the parameters.
> 
> Signed-off-by: Márton Németh <nm127@...email.hu>
> Cc: Greg Kroah-Hartman <gregkh@...e.de>

Thanks Márton, applied.

> 
> ---
> --- linux-2.6.29-rc5/block/genhd.c.orig	2009-02-14 18:36:39.000000000 +0100
> +++ linux-2.6.29-rc5/block/genhd.c	2009-02-20 06:53:56.000000000 +0100
> @@ -256,6 +256,22 @@ void blkdev_show(struct seq_file *seqf,
>  }
>  #endif /* CONFIG_PROC_FS */
> 
> +/**
> + * register_blkdev - register a new block device
> + *
> + * @major: the requested major device number [1..255]. If @major=0, try to
> + *         allocate any unused major number.
> + * @name: the name of the new block device as a zero terminated string
> + *
> + * The @name must be unique within the system.
> + *
> + * The return value depends on the @major input parameter.
> + *  - if a major device number was requested in range [1..255] then the
> + *    function returns zero on success, or a negative error code
> + *  - if any unused major number was requested with @major=0 parameter
> + *    then the return value is the allocated major number in range
> + *    [1..255] or a negative error code otherwise
> + */
>  int register_blkdev(unsigned int major, const char *name)
>  {
>  	struct blk_major_name **n, *p;
> --
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-- 
Jens Axboe

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