On Mon, Feb 02, 2026 at 10:19:33AM -0800, Josh Poimboeuf wrote:
> On Mon, Feb 02, 2026 at 05:18:13PM +0100, Arnd Bergmann wrote:
> > Hi,
> >
> > I see a new objtool related build failure on current linux-next
> > with clang-21:
> >
> > samples/livepatch/livepatch-shadow-fix1.o: error: objtool: static_call:
> > can't find static_call_key symbol: __SCK__WARN_trap
> >
> > I couldn't figure out what exactly is going on there, this seems fine
> > with gcc, and so far only one of hundreds of configs has this issue.
> >
> > See the attachments for .config and the object file.
>
> Ah, this is CONFIG_MEM_ALLOC_PROFILING_DEBUG inserting a WARN() in the
> sample livepatch module's memory allocation, triggering the following
> warning (file->klp is true):
>
> if (!key_sym) {
> if (!opts.module || file->klp) {
> ERROR("static_call: can't find static_call_key
> symbol: %s", tmp);
> return -1;
> }
>
>
> So this is showing that the sample livepatch modules (which are built
> differently from the new klp-build way of building livepatch modules)
> will fail to build when trying to access a non-exported static key.
Erm, non-exported static *call*.
--
Josh
