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SubjectRe: [PATCH] powerpc: Fix HAVE_HARDLOCKUP_DETECTOR_ARCH build configuration
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Le 27/03/2021 à 10:49, Chen Huang a écrit :
> When compiling the powerpc with the SMP disabled, it shows the issue:
>
> arch/powerpc/kernel/watchdog.c: In function ‘watchdog_smp_panic’:
> arch/powerpc/kernel/watchdog.c:177:4: error: implicit declaration of function ‘smp_send_nmi_ipi’; did you mean ‘smp_send_stop’? [-Werror=implicit-function-declaration]
> 177 | smp_send_nmi_ipi(c, wd_lockup_ipi, 1000000);
> | ^~~~~~~~~~~~~~~~
> | smp_send_stop
> cc1: all warnings being treated as errors
> make[2]: *** [scripts/Makefile.build:273: arch/powerpc/kernel/watchdog.o] Error 1
> make[1]: *** [scripts/Makefile.build:534: arch/powerpc/kernel] Error 2
> make: *** [Makefile:1980: arch/powerpc] Error 2
> make: *** Waiting for unfinished jobs....
>
> We found that powerpc used ipi to implement hardlockup watchdog, so the
> HAVE_HARDLOCKUP_DETECTOR_ARCH should depend on the SMP.
>
> Fixes: 2104180a5369 ("powerpc/64s: implement arch-specific hardlockup watchdog")
> Reported-by: Hulk Robot <hulkci@huawei.com>
> Signed-off-by: Chen Huang <chenhuang5@huawei.com>
> ---
> arch/powerpc/Kconfig | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
> index 764df010baee..2d4f37b117ce 100644
> --- a/arch/powerpc/Kconfig
> +++ b/arch/powerpc/Kconfig
> @@ -225,7 +225,7 @@ config PPC
> select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS
> select HAVE_MOD_ARCH_SPECIFIC
> select HAVE_NMI if PERF_EVENTS || (PPC64 && PPC_BOOK3S)
> - select HAVE_HARDLOCKUP_DETECTOR_ARCH if (PPC64 && PPC_BOOK3S)
> + select HAVE_HARDLOCKUP_DETECTOR_ARCH if PPC64 && PPC_BOOK3S && SMP

While modifying this line, you should restore the alphabetic order by moving it up.

You can use PPC_BOOK3S_64 instead of PPC64 && PPC_BOOK3S

> select HAVE_OPTPROBES if PPC64
> select HAVE_PERF_EVENTS
> select HAVE_PERF_EVENTS_NMI if PPC64
>

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