linux-kernel - Re: [PATCH 3/3] ideapad: add hotkey support

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Date:	Thu, 02 Dec 2010 15:41:27 -0800
From:	Dave Hansen <dave@...ux.vnet.ibm.com>
To:	Ike Panhc <ike.pan@...onical.com>
Cc:	linux-kernel@...r.kernel.org, platform-driver-x86@...r.kernel.org,
	Matthew Garrett <mjg@...hat.com>,
	David Woodhouse <dwmw2@...radead.org>
Subject: Re: [PATCH 3/3] ideapad: add hotkey support

On Wed, 2010-11-17 at 15:00 +0800, Ike Panhc wrote:
> +static void ideapad_input_report(unsigned long scancode)
> +{
> +       sparse_keymap_report_event(ideapad_priv->inputdev, scancode, 1, true);
> +} 

I got a little build error about some unresolved symbols in the module
while compiling:
        
        ERROR: "sparse_keymap_setup" [drivers/platform/x86/ideapad-laptop.ko] undefined!
        ERROR: "sparse_keymap_free" [drivers/platform/x86/ideapad-laptop.ko] undefined!
        ERROR: "sparse_keymap_report_event" [drivers/platform/x86/ideapad-laptop.ko] undefined!
        
You can get it to go away by setting CONFIG_INPUT_SPARSEKMAP=m or =y
in .config.  But, I think your patches need this:

diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index faec777..879d266 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -226,6 +226,7 @@ config IDEAPAD_LAPTOP
 	tristate "Lenovo IdeaPad Laptop Extras"
 	depends on ACPI
 	depends on RFKILL
+	select INPUT_SPARSEKMAP
 	help
 	  This is a driver for the rfkill switches on Lenovo IdeaPad netbooks.
 

Signed-off-by: Dave Hansen <dave@...ux.vnet.ibm.com>

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