linux-kernel - Re: [RFC][PATCH] ftrace: Add internal recursive checks

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Date:	Wed, 25 May 2011 20:57:25 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Steven Rostedt <rostedt@...dmis.org>
cc:	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <peterz@...radead.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	"paulmck@...ux.vnet.ibm.com" <paulmck@...ux.vnet.ibm.com>,
	Witold Baryluk <baryluk@....if.uj.edu.pl>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [RFC][PATCH] ftrace: Add internal recursive checks

On Wed, 25 May 2011, Steven Rostedt wrote:
> +
> +	/* Only current can touch these values */
> +#define trace_recursion_inc() (current)->trace_recursion++
> +#define trace_recursion_dec() (current)->trace_recursion--
> +	/* Ring buffer has the 10 LSB bits to count */
> +#define trace_recursion_buffer() ((current)->trace_recursion & 0x3ff)
> +#define TRACE_INTERNAL_BIT		(1<<11)
> +#define TRACE_GLOBAL_BIT		(1<<12)
> +#define trace_recursion_set(bit)	(current)->trace_recursion |= (bit)
> +#define trace_recursion_clear(bit)	(current)->trace_recursion &= ~(bit)
> +#define trace_recursion_test(bit)	((current)->trace_recursion & (bit))
> +
>  #endif /* CONFIG_TRACING */

Bah, these are only used in kernel/trace/. So can you please add them
to a kernel/trace local header file instead of cramming it mindlessly
into task_struct just because you're lazy?

Thanks,

	tglx
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