linux-kernel - Re: [PATCH v2] s390/jump_label: Use %*ph to print small buffers

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Date:	Thu, 27 Aug 2015 09:34:42 +0200
From:	Martin Schwidefsky <schwidefsky@...ibm.com>
To:	Alexander Kuleshov <kuleshovmail@...il.com>
Cc:	Heiko Carstens <heiko.carstens@...ibm.com>, linux390@...ibm.com,
	linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] s390/jump_label: Use %*ph to print small buffers

On Thu, 27 Aug 2015 01:17:46 +0600
Alexander Kuleshov <kuleshovmail@...il.com> wrote:

> printk() supports %*ph format specifier for printing a small buffers,
> let's use it intead of %02x %02x...
> 
> Signed-off-by: Alexander Kuleshov <kuleshovmail@...il.com>
> ---
>  arch/s390/kernel/jump_label.c | 9 +++------
>  1 file changed, 3 insertions(+), 6 deletions(-)
> 
> diff --git a/arch/s390/kernel/jump_label.c b/arch/s390/kernel/jump_label.c
> index a902996..1f615f3 100644
> --- a/arch/s390/kernel/jump_label.c
> +++ b/arch/s390/kernel/jump_label.c
> @@ -44,12 +44,9 @@ static void jump_label_bug(struct jump_entry *entry, struct insn *expected,
>  	unsigned char *ipn = (unsigned char *)new;
> 
>  	pr_emerg("Jump label code mismatch at %pS [%p]\n", ipc, ipc);
> -	pr_emerg("Found:    %02x %02x %02x %02x %02x %02x\n",
> -		 ipc[0], ipc[1], ipc[2], ipc[3], ipc[4], ipc[5]);
> -	pr_emerg("Expected: %02x %02x %02x %02x %02x %02x\n",
> -		 ipe[0], ipe[1], ipe[2], ipe[3], ipe[4], ipe[5]);
> -	pr_emerg("New:      %02x %02x %02x %02x %02x %02x\n",
> -		 ipn[0], ipn[1], ipn[2], ipn[3], ipn[4], ipn[5]);
> +	pr_emerg("Found:    %6ph\n", ipc);
> +	pr_emerg("Expected: %6ph\n", ipe);
> +	pr_emerg("New:      %6ph\n", ipn);
>  	panic("Corrupted kernel text");
>  }
 
Nice. Applied to the s390 features branch. Thanks.

-- 
blue skies,
   Martin.

"Reality continues to ruin my life." - Calvin.

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