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Message-ID: <1403639030.29061.37.camel@joe-AO725>
Subject: Re: [RFC PATCH 1/3] init.h: Add __init_str / __exit_str macros
From: Joe Perches <joe@perches.com>
To: Mathias Krause <minipli@googlemail.com>
Cc: linux-kernel@vger.kernel.org, Andrew Morton <akpm@linux-foundation.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Steven Rostedt <rostedt@goodmis.org>,
        "Rafael J. Wysocki" <rjw@rjwysocki.net>,
        Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>,
        "H. Peter Anvin" <hpa@zytor.com>, Jason Baron <jbaron@redhat.com>
Date: Tue, 24 Jun 2014 12:43:50 -0700
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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.