linux-kernel - Re: [PATCH] compile time initialization for event flags value

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Message-ID: <20110126171939.GC1757@nowhere>
Date:	Wed, 26 Jan 2011 18:19:41 +0100
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Lai Jiangshan <laijs@...fujitsu.com>,
	Steven Rostedt <rostedt@...dmis.org>
Cc:	Ingo Molnar <mingo@...e.hu>, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] compile time initialization for event flags value

On Wed, Jan 26, 2011 at 04:49:00PM +0800, Lai Jiangshan wrote:
> compile time initialization is better than runtime initialization.
> 
> impact: remove many early_initcall()s and many trace_init_flags_##name()s.
> 
> Signed-off-by: Lai Jiangshan <laijs@...fujitsu.com>
> ---
> diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
> index 18cd068..ff074c8 100644
> --- a/include/linux/syscalls.h
> +++ b/include/linux/syscalls.h
> @@ -135,8 +135,8 @@ extern struct trace_event_functions exit_syscall_print_funcs;
>  		.class			= &event_class_syscall_enter,	\
>  		.event.funcs            = &enter_syscall_print_funcs,	\
>  		.data			= (void *)&__syscall_meta_##sname,\
> -	};								\
> -	__TRACE_EVENT_FLAGS(enter_##sname, TRACE_EVENT_FL_CAP_ANY)
> +		.flags			= TRACE_EVENT_FL_CAP_ANY,	\
> +	};
>  
>  #define SYSCALL_TRACE_EXIT_EVENT(sname)					\
>  	static struct syscall_metadata					\
> @@ -149,8 +149,8 @@ extern struct trace_event_functions exit_syscall_print_funcs;
>  		.class			= &event_class_syscall_exit,	\
>  		.event.funcs		= &exit_syscall_print_funcs,	\
>  		.data			= (void *)&__syscall_meta_##sname,\
> -	};								\
> -	__TRACE_EVENT_FLAGS(exit_##sname, TRACE_EVENT_FL_CAP_ANY)
> +		.flags			= TRACE_EVENT_FL_CAP_ANY,	\
> +	};
>  
>  #define SYSCALL_METADATA(sname, nb)				\
>  	SYSCALL_TRACE_ENTER_EVENT(sname);			\

Acked-by: Frederic Weisbecker <fweisbec@...il.com>
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