Re: Help required for Compiling a staging driver

[Kumar Gaurav <kumargauravgupta3@gmail.com>]

On Tuesday 15 April 2014 12:16 AM, Greg KH wrote:
> On Tue, Apr 15, 2014 at 12:08:18AM +0530, Kumar Gaurav wrote:
>> Hi All,
>>
>> I'm trying to upgrade a driver using semaphore to use mutex. I have
>> applied the required changes. Now i want to compile it to ensure that i
>> didn't broke the kernel.
>>
>> Driver Path:drivers/staging/dgap/
>> I Marked this driver to load as loadable module
>>
>>       kumar@anandlinux:/usr/linux-git$ grep CONFIG_DGAP .config
>>       CONFIG_DGAP=m
>>
>> Now I'm trying to compile it using below command and getting result as given
>>       kumar@anandlinux:/usr/linux-git$ sudo make M=drivers/staging/dgap/
>>         Building modules, stage 2.
>>         MODPOST 0 modules
> Never build kernel code as root.  We used to have a bug in the build
> system that if you did this, it would delete your whole filesystem.
> Some of us argued that we should leave it there just to keep people from
> ever doing this again :)
>
>> So, No module is getting build and again i'm not getting any Error as
>> well. Please tell me where i'm doing wrong.
> Have you built this kernel source tree before?  Do a full build first,
> before trying to just build one directory.  That should resolve the
> issue.
What does it mean by full build? You mean compiling All modules? If yes 
then is there anyway to mark all module at once or i need to mark 
everything one by one (i use menuconfig)?
> And again, not as root please.
>
> greg k-h