linux-kernel - [PATCH] x86: don't use module_init for non-modular core bootflag code

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Date:	Sun, 12 Jan 2014 12:57:48 -0500
From:	Paul Gortmaker <paul.gortmaker@...driver.com>
To:	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>
CC:	<x86@...nel.org>, <linux-kernel@...r.kernel.org>,
	Paul Gortmaker <paul.gortmaker@...driver.com>
Subject: [PATCH] x86: don't use module_init for non-modular core bootflag code

The bootflag.o is obj-y (always built in).  It will never be
modular, so using module_init as an alias for __initcall is
somewhat misleading.

Fix this up now, so that we can relocate module_init from
init.h into module.h in the future.  If we don't do this, we'd
have to add module.h to obviously non-modular code, and that
would be a worse thing.

Note that direct use of __initcall is discouraged, vs. one
of the priority categorized subgroups.  As __initcall gets
mapped onto device_initcall, our use of arch_initcall (which
makes sense for arch code) will thus change this registration
from level 6-device to level 3-arch (i.e. slightly earlier).
However no observable impact of that small difference has
been observed during testing, or is expected.

Signed-off-by: Paul Gortmaker <paul.gortmaker@...driver.com>

diff --git a/arch/x86/kernel/bootflag.c b/arch/x86/kernel/bootflag.c
index 5de7f4c56971..52c8e3c7789d 100644
--- a/arch/x86/kernel/bootflag.c
+++ b/arch/x86/kernel/bootflag.c
@@ -98,4 +98,4 @@ static int __init sbf_init(void)

 	return 0;
 }
-module_init(sbf_init);
+arch_initcall(sbf_init);
-- 
1.8.5.2

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