linux-kernel - Re: [PATCH 5/5] tracing: convert irq events to use __print

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Date:	Thu, 21 May 2009 13:35:01 +0800
From:	Li Zefan <lizf@...fujitsu.com>
To:	Steven Rostedt <rostedt@...dmis.org>
CC:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Christoph Hellwig <hch@...radead.org>,
	Jason Baron <jbaron@...hat.com>
Subject: Re: [PATCH 5/5] tracing: convert irq events to use __print_symbolic

> +#define softirq_name(sirq) { sirq, #sirq }
> +#define show_softirq_name(val)						\
> +	__print_symbolic(val,						\
> +			 softirq_name(HI_SOFTIRQ),			\
> +			 softirq_name(TIMER_SOFTIRQ),			\
> +			 softirq_name(NET_TX_SOFTIRQ),			\
> +			 softirq_name(NET_RX_SOFTIRQ),			\
> +			 softirq_name(BLOCK_SOFTIRQ),			\
> +			 softirq_name(TASKLET_SOFTIRQ),			\
> +			 softirq_name(SCHED_SOFTIRQ),			\
> +			 softirq_name(HRTIMER_SOFTIRQ),			\
> +			 softirq_name(RCU_SOFTIRQ))
> +

The ending "_SOFTIRQ" is just redundant.

And it's you that removed "_SOFTIRQ" in the output of irq
trace events. ;)

==========
commit 899039e8746bb9a09b6487ddb8ab2275ce9d0256
Author: Steven Rostedt <srostedt@...hat.com>
Date:   Fri Mar 13 00:43:33 2009 -0400

    softirq: no need to have SOFTIRQ in softirq name

    Impact: clean up

    It is redundant to have 'SOFTIRQ' in the softirq names.
==========

How about:

#define softirq_name(sirq) { sirq ## _SOFTIRQ, #sirq }
#define show_softirq_name(val)						\
	__print_symbolic(val,						\
			 softirq_name(HI),				\

or:

#define softirq_name(sirq) { sirq, softirq_to_name[sirq] }

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