Re: [PATCH v2] MIPS: SMP-CPS: fix build error when HOTPLUG_CPU not set

[Philippe Mathieu-Daudé]

On 17/2/23 21:07, Randy Dunlap wrote:
> When MIPS_CPS=y, MIPS_CPS_PM is not set, HOTPLUG_CPU is not set, and
> KEXEC=y, cps_shutdown_this_cpu() attempts to call cps_pm_enter_state(),
> which is not built when MIPS_CPS_PM is not set.
> Conditionally execute the else branch based on CONFIG_HOTPLUG_CPU
> to remove the build error.
> This build failure is from a randconfig file.
>
> mips-linux-ld: arch/mips/kernel/smp-cps.o: in function `$L162':
> smp-cps.c:(.text.cps_kexec_nonboot_cpu+0x31c): undefined reference to `cps_pm_enter_state'
>
> Fixes: 1447864bee4c ("MIPS: kexec: CPS systems to halt nonboot CPUs")
> Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
> Cc: Dengcheng Zhu <dzhu@xxxxxxxxxxxx>
> Cc: Paul Burton <paulburton@xxxxxxxxxx>
> Cc: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>
> Cc: linux-mips@xxxxxxxxxxxxxxx
> Cc: Sergei Shtylyov <sergei.shtylyov@xxxxxxxxx>
> ---
> v2: use IS_ENABLED() instead of #ifdef-ery (Sergei)
>
>   arch/mips/kernel/smp-cps.c |    8 +++++---
>   1 file changed, 5 insertions(+), 3 deletions(-)

Reviewed-by: Philippe Mathieu-Daudé <philmd@xxxxxxxxxx>