linux-kernel - Re: [RFC PATCH 1/3] init.h: Add __init_str / __exit

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Date:	Tue, 24 Jun 2014 12:43:50 -0700
From:	Joe Perches <joe@...ches.com>
To:	Mathias Krause <minipli@...glemail.com>
Cc:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, Jason Baron <jbaron@...hat.com>
Subject: Re: [RFC PATCH 1/3] init.h: Add __init_str / __exit_str macros

On Mon, 2014-06-23 at 00:46 +0200, Mathias Krause wrote:
> Add macros to be able to mark string literals used in __init / __exit
> functions.
[]
> diff --git a/include/linux/init.h b/include/linux/init.h
[]
> +#define __init_str(str)	__mark_str(str, __UNIQUE_ID(_init_str_), __initconst)
> +#define __exit_str(str)	__mark_str(str, __UNIQUE_ID(_exit_str_), __exitdata)
> +#define __mark_str(str, var, __section) \
> +	({ static const char var[] __section __aligned(1) = str; var; })
> +

You probably want to make these strings vanish
completely when !CONFIG_PRINTK.

As is, they will always exist in the image.


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