Re: [PATCH] drm: Fix build error caused by missing drm_nomodeset.o

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On 11/27/21 20:26, Daniel Vetter wrote:
> On Sat, Nov 27, 2021 at 08:19:10PM +0100, Javier Martinez Canillas wrote:
>> The patch for commit ("6a2d2ddf2c34 drm: Move nomodeset kernel parameter
>> to the DRM subsystem") was generated with config 'diff.noprefix true'.
>>
>> But later was applied using 'cat nomodeset.mbox | dim apply-branch' on a
>> machine with 'diff.noprefix false'. And command 'git am --scissors -3' as
> 
> Huh that's a dangerous setting, I guess a dim patch to check for this and
> very loudly complain would be good? Care to type that up?  It's no big
> deal because strange git settings for dim is pretty much a game of
> whack-a-mole, but we should tackle them when they pop up.
>

Sure.

>> used by the dim tool doesn't handle that case well, since the 3-way merge
>> wrongly resolves the path for new file drivers/gpu/drm/drm_nomodeset.c as
>> gpu/drm/drm_nomodeset.c instead.
>>
>> It led to the following build error as reported by the kernel test robot:
>>
>>   make[4]: *** No rule to make target 'drivers/gpu/drm/drm_nomodeset.o', needed by 'drivers/gpu/drm/built-in.a'.
>>
>> Fixes: ("6a2d2ddf2c34 drm: Move nomodeset kernel parameter to the DRM subsystem")
>> Reported-by: kernel test robot <lkp@xxxxxxxxx>
>> Signed-off-by: Javier Martinez Canillas <javierm@xxxxxxxxxx>
> 
> Build testing before pushing should be done, not the other way round :-)
> 

Yes, sorry about that. I wrongly assumed that the tools would do the correct
thing but I will make sure to build test before pushing in the future.

> Also this is pretty much why we want gitlab CI and real branches.
>
> Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
>> ---

Thanks!

Best regards,
-- 
Javier Martinez Canillas
Linux Engineering
Red Hat




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