linux-kernel - Re: [RFC PATCH] Add CRC checksum for RCU lists

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Message-ID: <Pine.LNX.4.64.0709211516060.30810@fbirervta.pbzchgretzou.qr>
Date:	Fri, 21 Sep 2007 15:16:33 +0200 (CEST)
From:	Jan Engelhardt <jengelh@...putergmbh.de>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
cc:	Steven Rostedt <rostedt@...dmis.org>,
	"Paul E. McKenney" <paulmck@...ibm.com>,
	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [RFC PATCH] Add CRC checksum for RCU lists


On Sep 21 2007 14:02, Peter Zijlstra wrote:
>> +	if (unlikely(head->crc != rcu_crc_calc(head)) && !once) {
>> +		once++;
>> +		printk("BUG: RCU check failed!");
>> +		if (head->caller)
>> +			printk(" (caller=%p)",
>> +			       head->caller);
>
>		char sym[KSYM_SYMBOL_LEN];
>		sprint_symbol(sym, head->caller);
>		printk(" (caller: [<%p>] %s)", head->caller, sym);

This has been wondering me some time. Kernel oopses also use [<%p>],
but what really for are two sort of braces needed?

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