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Re: [PATCH] Warp speed building

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On Tue, Jun 16, 2009 at 11:39 AM, Hauke Mehrtens<hauke@xxxxxxxxxx> wrote:
> Jan Kiszka wrote:
>> Including config.mk again when kbuild called into the top level Makefile
>> slowed down the build process awfully. The reason for this were all the
>> dynamic, shell-based variable evaluations that were called over and over
>> again. Fortunately, including config.mk only in the outer Makefile run
>> appears to be enough. So let's remove this warp speed blocker.
>>
>> Signed-off-by: Jan Kiszka <jan.kiszka@xxxxxx>
>> ---
>>  Makefile |    2 --
>>  1 files changed, 0 insertions(+), 2 deletions(-)
>>
>> diff --git a/Makefile b/Makefile
>> index 0ab7d27..49a786a 100644
>> --- a/Makefile
>> +++ b/Makefile
>> @@ -13,8 +13,6 @@ OLD_IWL=$(shell $(MODPROBE) -l iwl4965)
>>
>>  ifneq ($(KERNELRELEASE),)
>>
>> -include $(M)/$(COMPAT_CONFIG)
>> -
>>  NOSTDINC_FLAGS := -I$(M)/include/ -include $(M)/include/net/compat.h $(CFLAGS)
>>
>>  obj-y := net/wireless/ net/mac80211/ net/rfkill/
>
> Hi Jan,
>
> I have tested this patch and it reduced the build time for me from 3:30
> to 2:40 minutes on a dual core system. I can not see any changes, expect
> the reduced build time on my system. The resulting modules are still the
> same.

Reason for including the config.mk is if your current kernel config
differs the makefiles won't pick up the new stuff.

  Luis
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