On 10/13/2014 10:43 PM, Jim Davis wrote:
> Building with the attached random configuration file,
>
> drivers/built-in.o: In function `int3406_thermal_probe':
> int3406_thermal.c:(.text+0x1d10b8): undefined reference to
> `acpi_video_get_levels'
> make: *** [vmlinux] Error 1
Thanks for the report Jim, below patch should fix this problem:
From: Aaron Lu <aaron...@intel.com>
Date: Thu, 16 Oct 2014 16:35:02 +0800
Subject: [PATCH] Thermal: int3406_thermal: solve the dependency build error
Jim found that the current kernel may trigger a build error with some
config: drivers/built-in.o: In function `int3406_thermal_probe':
int3406_thermal.c:(.text+0x1d10b8): undefined reference to
`acpi_video_get_levels'. The problem happens when CONFIG_THERMAL=y and
CONFIG_ACPI_VIDEO=m. Since the ACPI video driver can still work well
without CONFIG_THERMAL(regarding its main functionality: backlight
control), solve the problem by removing the select THERMAL line for
ACPI_VIDEO and adding the select ACPI_VIDEO for INT340X_THERMAL. The
result is that for kernels that do not have CONFIG_THERMAL selected now,
the ACPI video driver will not create the cooling device as it did
before(but works well otherwise).
Reported-by: Jim Davis <jim.ep...@gmail.com>
Signed-off-by: Aaron Lu <aaron...@intel.com>
---
drivers/acpi/Kconfig | 1 -
drivers/thermal/Kconfig | 1 +
2 files changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index b23fe37f67c0..8a09f98dbb0c 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -131,7 +131,6 @@ config ACPI_VIDEO
tristate "Video"
depends on X86 && BACKLIGHT_CLASS_DEVICE
depends on INPUT
- select THERMAL
help
This driver implements the ACPI Extensions For Display Adapters
for integrated graphics devices on motherboard, as specified in
diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
index 9b012ff65220..4e1053a8d774 100644
--- a/drivers/thermal/Kconfig
+++ b/drivers/thermal/Kconfig
@@ -235,6 +235,7 @@ config INT340X_THERMAL
select THERMAL_GOV_USER_SPACE
select ACPI_THERMAL_REL
select ACPI_FAN
+ select ACPI_VIDEO
help
Newer laptops and tablets that use ACPI may have thermal sensors and
other devices with thermal control capabilities outside the core
--
1.9.3
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