| Message ID | 20230217063858.28311-1-rdunlap@infradead.org (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [RFC] MIPS: SMP-CPS: fix build error when HOTPLUG_CPU not set | expand |
On 2/17/23 9:38 AM, 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 `$L162': > smp-cps.c:(.text.cps_kexec_nonboot_cpu+0x31c): undefined reference to `cps_pm_enter_state' > > Fixes: 1447864bee4c ("MIPS: kexec: CPS systems to halt nonboot CPUs") > Signed-off-by: Randy Dunlap <rdunlap@infradead.org> > Cc: Dengcheng Zhu <dzhu@wavecomp.com> > Cc: Paul Burton <paulburton@kernel.org> > Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> > Cc: linux-mips@vger.kernel.org > --- > arch/mips/kernel/smp-cps.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff -- a/arch/mips/kernel/smp-cps.c b/arch/mips/kernel/smp-cps.c > --- a/arch/mips/kernel/smp-cps.c > +++ b/arch/mips/kernel/smp-cps.c > @@ -424,9 +424,11 @@ static void cps_shutdown_this_cpu(enum c > wmb(); > } > } else { > +#ifdef CONFIG_HOTPLUG_CPU Perhaps, instead of #ifdef'ery, ude the following: } else if (IS_ENABLED(CONFIG_HOTPLUG_CPU)) { > pr_debug("Gating power to core %d\n", core); > /* Power down the core */ > cps_pm_enter_state(CPS_PM_POWER_GATED); > +#endif /* CONFIG_HOTPLUG_CPU */ > } > } > MBR, Sergey
diff -- a/arch/mips/kernel/smp-cps.c b/arch/mips/kernel/smp-cps.c --- a/arch/mips/kernel/smp-cps.c +++ b/arch/mips/kernel/smp-cps.c @@ -424,9 +424,11 @@ static void cps_shutdown_this_cpu(enum c wmb(); } } else { +#ifdef CONFIG_HOTPLUG_CPU pr_debug("Gating power to core %d\n", core); /* Power down the core */ cps_pm_enter_state(CPS_PM_POWER_GATED); +#endif /* CONFIG_HOTPLUG_CPU */ } }
When MIPS_CPS=y, MIPS_CPS_PM is not set, HOTPLUG_CPU is not set, and KEXEC=y, cps_shutdown_this_cpu() attempts to call cps_pm_enter_state(), which is not built when MIPS_CPS_PM is not set. Conditionally execute the else branch based on CONFIG_HOTPLUG_CPU to remove the build error. This build failure is from a randconfig file. mips-linux-ld: arch/mips/kernel/smp-cps.o: in function `$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@infradead.org> Cc: Dengcheng Zhu <dzhu@wavecomp.com> Cc: Paul Burton <paulburton@kernel.org> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: linux-mips@vger.kernel.org --- arch/mips/kernel/smp-cps.c | 2 ++ 1 file changed, 2 insertions(+)