linux-kernel - [PATCH] drm/i915: fix build error without CONFIG_BACKLIGHT_CLASS

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Message-Id: <20170329092722.6352-1-tobias.regnery@gmail.com>
Date:   Wed, 29 Mar 2017 11:27:22 +0200
From:   Tobias Regnery <tobias.regnery@...il.com>
To:     daniel.vetter@...el.com, intel-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Cc:     Tobias Regnery <tobias.regnery@...il.com>
Subject: [PATCH] drm/i915: fix build error without CONFIG_BACKLIGHT_CLASS_DEVICE

With CONFIG_ACPI=n and CONFIG_BACKLIGHT_CLASS_DEVICE=n we see the following
link error in the i915 driver:

drivers/built-in.o: In function 'intel_backlight_device_register':
(.text+0x2a921d): undefined reference to 'backlight_device_register'

Fix this by removing the condition on ACPI from the appropriate select
statement.

Signed-off-by: Tobias Regnery <tobias.regnery@...il.com>
---
 drivers/gpu/drm/i915/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/Kconfig b/drivers/gpu/drm/i915/Kconfig
index a5cd5dacf055..532df4bb9283 100644
--- a/drivers/gpu/drm/i915/Kconfig
+++ b/drivers/gpu/drm/i915/Kconfig
@@ -15,7 +15,7 @@ config DRM_I915
 	# i915 depends on ACPI_VIDEO when ACPI is enabled
 	# but for select to work, need to select ACPI_VIDEO's dependencies, ick
 	select BACKLIGHT_LCD_SUPPORT if ACPI
-	select BACKLIGHT_CLASS_DEVICE if ACPI
+	select BACKLIGHT_CLASS_DEVICE
 	select INPUT if ACPI
 	select ACPI_VIDEO if ACPI
 	select ACPI_BUTTON if ACPI
-- 
2.11.0