On 11/23/25 15:57, Christophe Leroy (CS GROUP) wrote:
Le 23/11/2025 à 13:13, René Rebe a écrit :
Building a size optimized ppc64 kernel (-Os), gcc emits more FP
save/restore symbols, that the linker generates on demand into the
.sfpr section. Explicitly allow-list those in scripts/mod/modpost.c,
too. They are needed for the amdgpu in-kernel floating point support.
Would have been interested to know with which version of GCC the problem
started.
I can reproduce the modpost errors on GCC 15.2 and GCC 11.5.
Same kernel .config builds ok with CLANG 20.1.8 however.
By the way you seem to fix the problem for modules, but does it also
work when amdgpu is in kernel ? I would have expected a need to add
functions in arch/powerpc/lib/crtsavres.S as well, just like following
commits:
If I build amdgpu statically into the kernel I don't get the modpost
errors, the build finishes successfully. Only building amdgpu as module
leads to these errors Rene reported.
Regards,
Erhard
