linux-kernel - Re: [PATCH 49/54] md/raid10: Replace printk() calls by the usage of higher level interfaces

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Date:   Thu, 6 Oct 2016 19:20:53 +0200
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     Joe Perches <coupons@...ches.com>
Cc:     linux-raid@...r.kernel.org, Christoph Hellwig <hch@....de>,
        Guoqing Jiang <gqjiang@...e.com>, Jens Axboe <axboe@...com>,
        Mike Christie <mchristi@...hat.com>,
        Neil Brown <neilb@...e.com>, Shaohua Li <shli@...nel.org>,
        Tomasz Majchrzak <tomasz.majchrzak@...el.com>,
        LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org,
        Julia Lawall <julia.lawall@...6.fr>
Subject: Re: [PATCH 49/54] md/raid10: Replace printk() calls by the usage of
 higher level interfaces

>> diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
>> index 5119846..0f2cb20 100644
>> --- a/drivers/md/raid10.c
>> +++ b/drivers/md/raid10.c
>> @@ -18,6 +18,8 @@
>>   * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
>>   */
>>  
>> +#define MY_LOG_PREFIX KBUILD_MODNAME ": "
>> +#define pr_fmt(fmt) MY_LOG_PREFIX fmt
> 
> Please just use
> 
> #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
> 
> like the more than thousand other uses in the kernel.

Thanks for your suggestion.

I got the impression that the omission of a macro like "MY_LOG_PREFIX"
would not really work for the suggested source code transformation so far.

How should a multiline log message be achieved as it was constructed
in the function "raid10_error" (for example)?
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/tree/drivers/md/raid10.c?id=c802e87fbe2d4dd58982d01b3c39bc5a781223aa#n1589

Regards,
Markus