linux-kernel - [PATCH v4 3/8] init.h: add early_param_on() and early_param

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Date:	Wed, 29 Apr 2015 14:44:22 -0700
From:	"Luis R. Rodriguez" <mcgrof@...not-panic.com>
To:	mingo@...e.hu, tglx@...utronix.de, hpa@...or.com, bp@...e.de,
	plagnioj@...osoft.com, tomi.valkeinen@...com,
	daniel.vetter@...el.com, airlied@...ux.ie
Cc:	dledford@...hat.com, awalls@...metrocast.net, syrjala@....fi,
	luto@...capital.net, mst@...hat.com, cocci@...teme.lip6.fr,
	linux-kernel@...r.kernel.org,
	"Luis R. Rodriguez" <mcgrof@...e.com>,
	Juergen Gross <jgross@...e.com>,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	Dave Airlie <airlied@...hat.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>, x86@...nel.org
Subject: [PATCH v4 3/8] init.h: add early_param_on() and early_param_off()

From: "Luis R. Rodriguez" <mcgrof@...e.com>

At times all we need is an enabler / disabler.

Cc: Andy Walls <awalls@...metrocast.net>
Cc: Doug Ledford <dledford@...hat.com>
Cc: Andy Lutomirski <luto@...capital.net>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Juergen Gross <jgross@...e.com>
Cc: Daniel Vetter <daniel.vetter@...ll.ch>
Cc: Dave Airlie <airlied@...hat.com>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>
Cc: Borislav Petkov <bp@...e.de>
Cc: Michael S. Tsirkin <mst@...hat.com>
Cc: linux-kernel@...r.kernel.org
Cc: x86@...nel.org
Signed-off-by: Luis R. Rodriguez <mcgrof@...e.com>
---
 include/linux/init.h | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/include/linux/init.h b/include/linux/init.h
index a0385cc..7773883 100644
--- a/include/linux/init.h
+++ b/include/linux/init.h
@@ -270,6 +270,29 @@ struct obs_kernel_param {
 #define early_param(str, fn)						\
 	__setup_param(str, fn, fn, 1)
 
+#define early_param_on(str_on, var, config)				\
+									\
+	int __read_mostly var = IS_ENABLED(config);			\
+									\
+	static int __init parse_##var##_on(char *arg)			\
+	{								\
+		var = 1;						\
+		return 0;						\
+	}								\
+	__setup_param(str_on, parse_##var##_on, parse_##var##_on, 1);	\
+									\
+
+#define early_param_off(str_off, var, config)				\
+									\
+	int __read_mostly var = IS_ENABLED(config);			\
+									\
+	static int __init parse_##var##_off(char *arg)			\
+	{								\
+		var = 0;						\
+		return 0;						\
+	}								\
+	__setup_param(str_off, parse_##var##_off, parse_##var##_off, 1)
+
 #define early_param_on_off(str_on, str_off, var, config)		\
 									\
 	int __read_mostly var = IS_ENABLED(config);			\
-- 
2.3.2.209.gd67f9d5.dirty

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