linux-kernel - Re: [PATCH v4] mtd: ubi: Extend UBI layer debug/messaging capabilities

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Message-ID: <20141014184702.GA12662@arch.hh.imgtec.org>
Date:	Tue, 14 Oct 2014 15:47:02 -0300
From:	Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>
To:	Artem Bityutskiy <dedekind1@...il.com>
Cc:	Tanya Brokhman <tlinder@...eaurora.org>,
	linux-mtd@...ts.infradead.org, linux-arm-msm@...r.kernel.org,
	David Woodhouse <dwmw2@...radead.org>,
	Brian Norris <computersforpeace@...il.com>,
	Richard Weinberger <richard@....at>,
	open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4] mtd: ubi: Extend UBI layer debug/messaging
 capabilities

On 14 Oct 06:09 PM, Artem Bityutskiy wrote:
> On Tue, 2014-10-14 at 11:39 -0300, Ezequiel Garcia wrote:
> > Please use some pr_fmt for this. Something like this before the headers
> > should be enough:
> > 
> > #define pr_fmt(fmt) "UBI: block:" fmt
> 
> Sinc ubiblock is a device, there should be a 'struct device' somewhere,
> so probably dev_printk() and other dev_*() printing functions would be a
> better choice?
> 

A quick code dig shows you should get the struct device associated
to the struct gendisk, with the disk_to_dev() macro.

In other words, something like this should work, provided 'dev' is defined
in the scope as a struct ubiblock:

  #define ubiblock_err(x) dev_err(disk_to_dev(dev->gd), x)

When the gendisk is not available, a simple pr_{} would work.
-- 
Ezequiel García, Free Electrons
Embedded Linux, Kernel and Android Engineering
http://free-electrons.com
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