[PATCH] extcon: Remove CONFIG_EXTCON_MODULE config to fix build break

[PATCH] extcon: Remove CONFIG_EXTCON_MODULE config to fix build break

[Chanwoo Choi]

This patch modify 'Kconfig' of EXTCON Subsystem to support either
active or inactive of EXTCON Subsystem. The various subsystem refer
to EXTCON subsystem for controlling external connector, so core class
of EXTCON should be included in kernel image. If EXTCON subsystem is
builded with MODULE, other subsystem have build break because of
linking the core class of EXTCON.

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
---
 drivers/extcon/Kconfig |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig
index 29c5cf8..b0eac45 100644
--- a/drivers/extcon/Kconfig
+++ b/drivers/extcon/Kconfig
@@ -1,5 +1,5 @@
 menuconfig EXTCON
-	tristate "External Connector Class (extcon) support"
+	bool "External Connector Class (extcon) support"
 	help
 	  Say Y here to enable external connector class (extcon) support.
 	  This allows monitoring external connectors by userspace
-- 
1.7.0.4

Re: [PATCH] extcon: Remove CONFIG_EXTCON_MODULE config to fix build break

[Greg KH]

On Thu, Jul 12, 2012 at 01:32:27PM +0900, Chanwoo Choi wrote:
> This patch modify 'Kconfig' of EXTCON Subsystem to support either
> active or inactive of EXTCON Subsystem. The various subsystem refer
> to EXTCON subsystem for controlling external connector, so core class
> of EXTCON should be included in kernel image. If EXTCON subsystem is
> builded with MODULE, other subsystem have build break because of
> linking the core class of EXTCON.

Then something else is wrong, as the extcon_class code should be able to
be built as a module.  Don't load up systems with kernel code that they
don't need (think of distro kernels that have to build everything.)

So no, please fix the real problem here, I will not take this patch,
sorry.

greg k-h

Re: [PATCH] extcon: Remove CONFIG_EXTCON_MODULE config to fix build break

[Chanwoo Choi]

Hi Greg,

On 07/13/2012 12:36 AM, Greg KH wrote:

> On Thu, Jul 12, 2012 at 01:32:27PM +0900, Chanwoo Choi wrote:
>> This patch modify 'Kconfig' of EXTCON Subsystem to support either
>> active or inactive of EXTCON Subsystem. The various subsystem refer
>> to EXTCON subsystem for controlling external connector, so core class
>> of EXTCON should be included in kernel image. If EXTCON subsystem is
>> builded with MODULE, other subsystem have build break because of
>> linking the core class of EXTCON.
> 
> Then something else is wrong, as the extcon_class code should be able to
> be built as a module.  Don't load up systems with kernel code that they
> don't need (think of distro kernels that have to build everything.)
> 
> So no, please fix the real problem here, I will not take this patch,
> sorry.

OK, I will add appropriate dependency to 'Kconfig' of subsystem/driver
using EXTCON
to resolve build break.

Thank you,
Chanwoo Choi

Re: [PATCH] extcon: Remove CONFIG_EXTCON_MODULE config to fix build break

[Mark Brown]

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On Thu, Jul 12, 2012 at 01:32:27PM +0900, Chanwoo Choi wrote:
> This patch modify 'Kconfig' of EXTCON Subsystem to support either
> active or inactive of EXTCON Subsystem. The various subsystem refer
> to EXTCON subsystem for controlling external connector, so core class
> of EXTCON should be included in kernel image. If EXTCON subsystem is
> builded with MODULE, other subsystem have build break because of
> linking the core class of EXTCON.

By this logic very little in the kernel should be a module.  We usually
only force things to be built in if there's a technical need for it like
init ordering constraints.  Generally this is just a case of making sure
the Kconfig stuff is set up with appropriate dependencies.

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Re: [PATCH] extcon: Remove CONFIG_EXTCON_MODULE config to fix build break

[Chanwoo Choi]

On 07/13/2012 01:16 AM, Mark Brown wrote:

> On Thu, Jul 12, 2012 at 01:32:27PM +0900, Chanwoo Choi wrote:
>> This patch modify 'Kconfig' of EXTCON Subsystem to support either
>> active or inactive of EXTCON Subsystem. The various subsystem refer
>> to EXTCON subsystem for controlling external connector, so core class
>> of EXTCON should be included in kernel image. If EXTCON subsystem is
>> builded with MODULE, other subsystem have build break because of
>> linking the core class of EXTCON.
> 
> By this logic very little in the kernel should be a module.  We usually
> only force things to be built in if there's a technical need for it like
> init ordering constraints.  Generally this is just a case of making sure
> the Kconfig stuff is set up with appropriate dependencies.


As you said, I will fix it.

Thank you,
Chanwoo Choi