Re: [PATCH net-next v23 1/7] mm: page_frag: add a test module for page_frag

[Mark Brown <broonie@kernel.org>]

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On Mon, Oct 28, 2024 at 07:53:36PM +0800, Yunsheng Lin wrote:
> The testing is done by ensuring that the fragment allocated
> from a frag_frag_cache instance is pushed into a ptr_ring
> instance in a kthread binded to a specified cpu, and a kthread
> binded to a specified cpu will pop the fragment from the
> ptr_ring and free the fragment.

This is breaking the build in -next on at least arm64 and x86_64 since
it's trying to build an out of tree kernel module which is included in
the selftests directory, the kselftest build system just isn't set up to
do that in a sensible and robust fashion.  The module should probably be
in the main kernel tree and enabled by the config file for the mm tests.

KernelCI sees:

***
*** Configuration file ".config" not found!
***
*** Please run some configurator (e.g. "make oldconfig" or
*** "make menuconfig" or "make xconfig").
***
Makefile:810: include/config/auto.conf.cmd: No such file or directory

(see https://storage.kernelci.org/next/master/next-20241114/x86_64/x86_64_defconfig%2Bkselftest/gcc-12/logs/kselftest.log)

and I've seen:

  ERROR: Kernel configuration is invalid.
         include/generated/autoconf.h or include/config/auto.conf are missing.
         Run 'make oldconfig && make prepare' on kernel src to fix it.

make[3]: *** [Makefile:788: include/config/auto.conf] Error 1

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