linux-kernel - Re: [PATCH 0/10] Add yaffs2 file system: Fifth patchset

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Message-ID: <4D617EF0.7020308@bluewatersys.com>
Date:	Mon, 21 Feb 2011 09:52:00 +1300
From:	Ryan Mallon <ryan@...ewatersys.com>
To:	Greg KH <greg@...ah.com>
CC:	Charles Manning <manningc2@...rix.gen.nz>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Christoph Hellwig <hch@...radead.org>,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	akpm@...ux-foundation.org
Subject: Re: [PATCH 0/10] Add yaffs2 file system:  Fifth patchset

On 02/21/2011 09:07 AM, Greg KH wrote:
> On Mon, Feb 21, 2011 at 06:25:08AM +1300, Charles Manning wrote:
>> On Friday 18 February 2011 13:58:52 Greg KH wrote:
>> I still intend to keep the tracing printk-based tracing:
>>
>> #define yaffs_trace(msk, fmt, ...) do { \
>> 	if (yaffs_trace_mask & (msk)) \
>> 		printk(KERN_DEBUG "yaffs: " fmt "\n", ##__VA_ARGS__); \
>> } while (0)
> 
> No, please don't invent your own stuff like this, again, use the
> in-kernel functionality provided for this.

Do you mean using pr_debug? Other filesystems (see for example
fs/ubifs/debug.h:dbg_do_msg) and drivers have similar approaches to this
to allow printk debugging with multiple message levels.

~Ryan

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