linux-kernel - Re: include: linux: slab: kmalloc_trace undefined when compiling drivers

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Date:   Sat, 12 Nov 2022 09:21:34 -0800
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Ian Cowan <ian@...ux.cowan.aero>, cl@...ux.com
Cc:     penberg@...nel.org, rientjes@...gle.com, iamjoonsoo.kim@....com,
        roman.gushchin@...ux.dev, 42.hyeyoo@...il.com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: include: linux: slab: kmalloc_trace undefined when compiling
 drivers

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:
> 
> ERROR: modpost: "kmalloc_trace" [drivers/pci/hotplug/acpiphp_ibm.ko] undefined!
> 
> This only occurs when I have 'CONFIG_TRACING=y' in my config, and I
> have traced it down to the slab header where the kmalloc_trace is
> defined. It appears that when CONFIG_TRACING is set, the kmalloc_trace
> and kmalloc_node_trace do not get defined by the compiler. I do not have
> enough context in this area of the code base to propose a fix or to even
> know if maybe it's a local compiling issue for myself. It looks like
> there are a few recent commits from August that did some refactoring in this header,
> and when compiling prior to that refactoring I am able to compile the
> specified drivers without error.
> 
> I will mention that I am using Red Hat gcc version 12.2.1 and make version
> 4.3 and am on Fedora.

Please post a full failing kernel .config file for this.
Thanks.

-- 
~Randy