Subject: Kernel build failure with MEM_ALLOC_PROFILING=y set (Talos II, v6.10-rc5)

From: Erhard Furtner <[email-masked]>
Date: Sat, 29 Jun 2024 15:31:28 +0200

Greetings!

I get a build failure on v6.10-rc5 on my Talos II when MEM_ALLOC_PROFILING=y is enabled:

[...]
  LD [M]  fs/xfs/xfs.o
  LD [M]  fs/bcachefs/bcachefs.o
  AR      built-in.a
  AR      vmlinux.a
  LD      vmlinux.o
  OBJCOPY modules.builtin.modinfo
  GEN     modules.builtin
  GEN     .vmlinux.objs
  MODPOST Module.symvers
ERROR: modpost: "page_ext_get" [arch/powerpc/kvm/kvm-hv.ko] undefined!
ERROR: modpost: "mem_alloc_profiling_key" [arch/powerpc/kvm/kvm-hv.ko] undefined!
ERROR: modpost: "page_ext_put" [arch/powerpc/kvm/kvm-hv.ko] undefined!
make[2]: *** [scripts/Makefile.modpost:145: Module.symvers] Fehler 1
make[1]: *** [/usr/src/linux-stable/Makefile:1886: modpost] Fehler 2
make: *** [Makefile:240: __sub-make] Fehler 2

Same .config builds fine without MEM_ALLOC_PROFILING set. Kernel .config attached.

Regards,
Erhard