On Thu, Jan 6, 2022 at 6:12 PM Rafael J. Wysocki <rafael@xxxxxxxxxx> wrote: > > On Thu, Jan 6, 2022 at 8:43 AM Huang Rui <ray.huang@xxxxxxx> wrote: > > > > The init_freq_invariance_cppc function is implemented in smpboot and depends on > > CONFIG_SMP. > > > > MODPOST vmlinux.symvers > > MODINFO modules.builtin.modinfo > > GEN modules.builtin > > LD .tmp_vmlinux.kallsyms1 > > ld: drivers/acpi/cppc_acpi.o: in function `acpi_cppc_processor_probe': > > /home/ray/brahma3/linux/drivers/acpi/cppc_acpi.c:819: undefined reference to `init_freq_invariance_cppc' > > make: *** [Makefile:1161: vmlinux] Error 1 > > > > See https://lore.kernel.org/lkml/484af487-7511-647e-5c5b-33d4429acdec@xxxxxxxxxxxxx/. > > > > Fixes: 41ea667227ba ("x86, sched: Calculate frequency invariance for AMD systems") > > Reported-by: kernel test robot <lkp@xxxxxxxxx> > > Reported-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx> > > Reported-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> > > Signed-off-by: Huang Rui <ray.huang@xxxxxxx> > > Cc: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> > > Cc: Borislav Petkov <bp@xxxxxxxxx> > > Cc: Ingo Molnar <mingo@xxxxxxxxxx> > > Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> > > Cc: x86@xxxxxxxxxx > > Cc: stable@xxxxxxxxxxxxxxx > > --- > > arch/x86/include/asm/topology.h | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/arch/x86/include/asm/topology.h b/arch/x86/include/asm/topology.h > > index cc164777e661..2f0b6be8eaab 100644 > > --- a/arch/x86/include/asm/topology.h > > +++ b/arch/x86/include/asm/topology.h > > @@ -221,7 +221,7 @@ static inline void arch_set_max_freq_ratio(bool turbo_disabled) > > } > > #endif > > > > -#ifdef CONFIG_ACPI_CPPC_LIB > > +#if defined(CONFIG_ACPI_CPPC_LIB) && defined(CONFIG_SMP) > > void init_freq_invariance_cppc(void); > > #define init_freq_invariance_cppc init_freq_invariance_cppc > > Why don't you check CONFIG_SMP instead of this symbol in cppc_acpi.c? > That file depends on CONFIG_ACPI_CPPC_LIB anyway. Scratch that, it needs to compile on non-x86 too. The $subject patch is cleaner than all of the alternatives I have considered, so I'm going to apply it. However, I'm not really happy with the dependencies between CPPC and smpboot.c going both ways.
