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Date:   Sat, 12 Nov 2022 20:21:14 -0500
From:   Ian Cowan <ian@linux.cowan.aero>
To:     Randy Dunlap <rdunlap@infradead.org>
Cc:     cl@linux.com, penberg@kernel.org, rientjes@google.com,
        iamjoonsoo.kim@lge.com, roman.gushchin@linux.dev,
        42.hyeyoo@gmail.com, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org
Subject: Re: include: linux: slab: kmalloc_trace undefined when compiling
 drivers
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On Sat, Nov 12, 2022 at 05:11:27PM -0800, Randy Dunlap wrote:
> 
> 
> On 11/12/22 16:43, Ian Cowan wrote:
> > On Sat, Nov 12, 2022 at 04:34:18PM -0800, Randy Dunlap wrote:
> >>
> >>
> >> On 11/12/22 13:59, Ian Cowan wrote:
> >>> On Sat, Nov 12, 2022 at 09:21:34AM -0800, Randy Dunlap wrote:
> >>>> Hi--
> >>>>
> >>>> On 11/12/22 08:37, Ian Cowan wrote:
> >>>>> When compiling drivers (speficially drivers/pci/hotplug), I am receiving
> >>>>> the following modpost error for both `kmalloc_trace` and
> >>>>> `kmalloc_node_trace` on the staging/staging-next branch:
> >>>>>
> >>
> >> Ian, what do you mean by "on the staging/staging-next branch"?
> >>
> >> What kernel version are you trying to build?
> >>
> >> The .config that you sent is for v6.1.0-rc1.
> > 
> > I am building from the staging repository (gregkh/staging) and my
> > working branch when building is staging-next. So I am trying to build
> > from staging and not a particular version. I have also run `make modules_prepare`
> > and updated the .config per that script. However, when I do build
> > v6.1.0-rc1 from the main repository (torvalds/linux), I run into the same problem.
> 
> Have you built the entire kernel already and then you are trying to build
> only drivers/pci/hotplug?
Yes, I did build the entire kernel already and then I'm just trying to
rebuild that module.

In `include/linux/slab.h` if I remove the lines between `#ifdef
CONFIG_TRACING` and `#else` (lines 473-480) and then the corresponding
`#endif` and leave lines 481-499, I'm able to compile that module
without issue.