linux-kernel - Re: [PATCH] s390/jump_label: Use %*ph to print small buffers

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Date:	Thu, 27 Aug 2015 01:12:22 +0600
From:	Alexander Kuleshov <kuleshovmail@...il.com>
To:	Tillmann Heidsieck <theidsieck@...nox.de>
Cc:	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	linux390@...ibm.com, linux-s390@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>,
	linux-kernel-owner@...r.kernel.org
Subject: Re: [PATCH] s390/jump_label: Use %*ph to print small buffers

Hello Tillmann, sorry for noise, will resend.

2015-08-27 1:03 GMT+06:00 Tillmann Heidsieck <theidsieck@...nox.de>:
> Hi Alexander,
>
> On 2015-08-26 20:49, Alexander Kuleshov wrote:
>>
>> printk() supports %*ph format specifier for printing a small buffers,
>> let's use it intead of %02x %02x...
>
>
> noble effort ...
>
>>         pr_emerg("Jump label code mismatch at %pS [%p]\n", ipc, ipc);
>> -       pr_emerg("Found:    %02x %02x %02x %02x %02x %02x\n",
>> +       pr_emerg("Found:    %6ph\n",
>>                  ipc[0], ipc[1], ipc[2], ipc[3], ipc[4], ipc[5]);
>> -       pr_emerg("Expected: %02x %02x %02x %02x %02x %02x\n",
>> +       pr_emerg("Expected: %6ph\n",
>>                  ipe[0], ipe[1], ipe[2], ipe[3], ipe[4], ipe[5]);
>> -       pr_emerg("New:      %02x %02x %02x %02x %02x %02x\n",
>> +       pr_emerg("New:      %6ph\n",
>>                  ipn[0], ipn[1], ipn[2], ipn[3], ipn[4], ipn[5]);
>>         panic("Corrupted kernel text");
>>  }
>
>
> ... but you might want to check our code before submission (e.g. compile
> it!)
>
> Cheers
> Tillmann
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