[PATCH v4 3/8] init.h: add early_param_on() and early_param_off()

["Luis R. Rodriguez" <mcgrof@do-not-panic.com>]

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

At times all we need is an enabler / disabler.

Cc: Andy Walls <awalls@md.metrocast.net>
Cc: Doug Ledford <dledford@redhat.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Juergen Gross <jgross@suse.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Dave Airlie <airlied@redhat.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: linux-kernel@vger.kernel.org
Cc: x86@kernel.org
Signed-off-by: Luis R. Rodriguez <mcgrof@suse.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