linux-kernel - Re: [TRIVIAL PATCH] block: Correct misuses of 0x%<decimal>

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Message-Id: <67B9124A-73E8-4AA1-81E5-18FAC69D3962@gmail.com>
Date:	Mon, 3 Aug 2015 16:56:36 +0800
From:	yalin wang <yalin.wang2010@...il.com>
To:	Joe Perches <joe@...ches.com>
Cc:	Don Brace <don.brace@...s.com>,
	open list <linux-kernel@...r.kernel.org>,
	iss_storagedev@...com, storagedev@...s.com,
	linux-scsi <linux-scsi@...r.kernel.org>
Subject: Re: [TRIVIAL PATCH] block: Correct misuses of 0x%<decimal>


> On Aug 3, 2015, at 16:03, Joe Perches <joe@...ches.com> wrote:
> 
> On Mon, 2015-08-03 at 15:25 +0800, yalin wang wrote:
>>> On Aug 3, 2015, at 04:25, Joe Perches <joe@...ches.com> wrote:
>>> 
>>> Correct misuse of 0x%d in logging messages.
>>> 
> []
>> why not use like this : dev_dbg(&h->pdev->dev, "   Max outstanding 
>> commands = %#x\n”  ? 
>> %#x will add 0x prefix automatically .
> 
> It's generally a consistency thing.
> A 0 value would be emitted as 0 and not 0x0.
> 
i try on my ubuntu , 

 static int __init throtl_init(void)                                                                                                           
  {                                                                                
         printk("module init test: %#x %p\n", 0, (void *)0x123);                  
          return 0;                                                                   
                                                                                    
  }                                                                                   
                                                                                      
  module_init(throtl_init); 

#uname -a
Linux ubuntu 3.16.0-38-generic #52~14.04.1-Ubuntu SMP Fri May 8 09:43:57 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

#dmesg
[259356.375586] module init test: 0x0 0000000000000123

it seems don’t need 0x%x for 0, just need %#x for all numbers.
there are lots of use like this, i can change them if needed:

# egrep -r  -i '0x%\d*x'  .  | wc -l 
11776


Thanks






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