Re: [PATCH v3 0/7] Remove unneeded build directory traversals

[Andrew F. Davis]

On 03/15/2017 04:03 PM, Arnd Bergmann wrote:
> On Wed, Mar 15, 2017 at 5:37 PM, Andrew F. Davis <afd@xxxxxx> wrote:
>> Hello all,
>>
>> I was building a kernel for x86 and noticed Make still descended into
>> directories like drivers/gpu/drm/hisilicon, this seems kind of odd given
>> nothing will be built here. It looks to be due to some directories being
>> included in obj-y unconditionally instead of only when the relevant
>> CONFIG_ is set.
>>
>> These patches are split by subsystem in-case, for some reason, a file in
>> a directory does need to be built, I believe I have checked for all
>> instances of this, but a quick review from some maintainers would be nice.
> 
> I didn't see anything wrong with the patches, and made sure that there
> are no tristate symbols controlling the subdirectory for anything that
> requires a built-in driver (which would cause a link failure).
> 
> I'm not sure about drivers/lguest, which has some special magic
> in its Makefile, it's possible that this now fails with CONFIG_LGUEST=m.
> 

lguest and mmc are the strange ones, so I put them last in the series in
case they did need to be dropped.

lguest was supposed to have been taken from v1:
https://lkml.org/lkml/2016/6/20/1086
but it looks like it didn't so I re-introduced it for v3.

mmc caught some 0-day build warnings but I never got to the bottom of them.

Anyway, I have no problem with these two being held back until the magic
in their Makefile is sorted out.

Thanks,
Andrew

>       Arnd
>