[PATCH] powerpc: Convert power off logic to pm_power_off

Benjamin Herrenschmidt benh at kernel.crashing.org
Wed Oct 22 17:09:53 AEDT 2014


On Wed, 2014-10-22 at 15:37 +1100, Michael Ellerman wrote:

> Hi guys, how does this look?
> 
> If it's OK I'll put it in a topic branch for Guenter.

No objection.

Cheers,
Ben.

> cheers
> 
> diff --git a/arch/powerpc/include/asm/machdep.h b/arch/powerpc/include/asm/machdep.h
> index 84c8acf40989..15c9150a58cc 100644
> --- a/arch/powerpc/include/asm/machdep.h
> +++ b/arch/powerpc/include/asm/machdep.h
> @@ -142,7 +142,6 @@ struct machdep_calls {
>  #endif
>  
>  	void		(*restart)(char *cmd);
> -	void		(*power_off)(void);
>  	void		(*halt)(void);
>  	void		(*panic)(char *str);
>  	void		(*cpu_die)(void);
> diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
> index 1362cd62b3fa..44c8d03558ac 100644
> --- a/arch/powerpc/kernel/setup-common.c
> +++ b/arch/powerpc/kernel/setup-common.c
> @@ -139,8 +139,8 @@ void machine_restart(char *cmd)
>  void machine_power_off(void)
>  {
>  	machine_shutdown();
> -	if (ppc_md.power_off)
> -		ppc_md.power_off();
> +	if (pm_power_off)
> +		pm_power_off();
>  #ifdef CONFIG_SMP
>  	smp_send_stop();
>  #endif
> @@ -151,7 +151,7 @@ void machine_power_off(void)
>  /* Used by the G5 thermal driver */
>  EXPORT_SYMBOL_GPL(machine_power_off);
>  
> -void (*pm_power_off)(void) = machine_power_off;
> +void (*pm_power_off)(void);
>  EXPORT_SYMBOL_GPL(pm_power_off);
>  
>  void machine_halt(void)
> diff --git a/arch/powerpc/platforms/44x/ppc476.c b/arch/powerpc/platforms/44x/ppc476.c
> index 58db9d083969..c11ce6516c8f 100644
> --- a/arch/powerpc/platforms/44x/ppc476.c
> +++ b/arch/powerpc/platforms/44x/ppc476.c
> @@ -94,7 +94,7 @@ static int avr_probe(struct i2c_client *client,
>  {
>  	avr_i2c_client = client;
>  	ppc_md.restart = avr_reset_system;
> -	ppc_md.power_off = avr_power_off_system;
> +	pm_power_off = avr_power_off_system;
>  	return 0;
>  }
>  
> diff --git a/arch/powerpc/platforms/52xx/efika.c b/arch/powerpc/platforms/52xx/efika.c
> index 3feffde9128d..6af651e69129 100644
> --- a/arch/powerpc/platforms/52xx/efika.c
> +++ b/arch/powerpc/platforms/52xx/efika.c
> @@ -212,6 +212,8 @@ static int __init efika_probe(void)
>  	DMA_MODE_READ = 0x44;
>  	DMA_MODE_WRITE = 0x48;
>  
> +	pm_power_off = rtas_power_off;
> +
>  	return 1;
>  }
>  
> @@ -225,7 +227,6 @@ define_machine(efika)
>  	.init_IRQ		= mpc52xx_init_irq,
>  	.get_irq		= mpc52xx_get_irq,
>  	.restart		= rtas_restart,
> -	.power_off		= rtas_power_off,
>  	.halt			= rtas_halt,
>  	.set_rtc_time		= rtas_set_rtc_time,
>  	.get_rtc_time		= rtas_get_rtc_time,
> diff --git a/arch/powerpc/platforms/83xx/mcu_mpc8349emitx.c b/arch/powerpc/platforms/83xx/mcu_mpc8349emitx.c
> index 463fa91ee5b6..15e8021ddef9 100644
> --- a/arch/powerpc/platforms/83xx/mcu_mpc8349emitx.c
> +++ b/arch/powerpc/platforms/83xx/mcu_mpc8349emitx.c
> @@ -167,10 +167,10 @@ static int mcu_probe(struct i2c_client *client, const struct i2c_device_id *id)
>  	if (ret)
>  		goto err;
>  
> -	/* XXX: this is potentially racy, but there is no lock for ppc_md */
> -	if (!ppc_md.power_off) {
> +	/* XXX: this is potentially racy, but there is no lock for pm_power_off */
> +	if (!pm_power_off) {
>  		glob_mcu = mcu;
> -		ppc_md.power_off = mcu_power_off;
> +		pm_power_off = mcu_power_off;
>  		dev_info(&client->dev, "will provide power-off service\n");
>  	}
>  
> @@ -197,7 +197,7 @@ static int mcu_remove(struct i2c_client *client)
>  	device_remove_file(&client->dev, &dev_attr_status);
>  
>  	if (glob_mcu == mcu) {
> -		ppc_md.power_off = NULL;
> +		pm_power_off = NULL;
>  		glob_mcu = NULL;
>  	}
>  
> diff --git a/arch/powerpc/platforms/85xx/corenet_generic.c b/arch/powerpc/platforms/85xx/corenet_generic.c
> index e56b89a792ed..1f309ccb096e 100644
> --- a/arch/powerpc/platforms/85xx/corenet_generic.c
> +++ b/arch/powerpc/platforms/85xx/corenet_generic.c
> @@ -170,7 +170,7 @@ static int __init corenet_generic_probe(void)
>  
>  			ppc_md.get_irq = ehv_pic_get_irq;
>  			ppc_md.restart = fsl_hv_restart;
> -			ppc_md.power_off = fsl_hv_halt;
> +			pm_power_off = fsl_hv_halt;
>  			ppc_md.halt = fsl_hv_halt;
>  #ifdef CONFIG_SMP
>  			/*
> diff --git a/arch/powerpc/platforms/85xx/sgy_cts1000.c b/arch/powerpc/platforms/85xx/sgy_cts1000.c
> index 8162b0412117..e149c9ec26ae 100644
> --- a/arch/powerpc/platforms/85xx/sgy_cts1000.c
> +++ b/arch/powerpc/platforms/85xx/sgy_cts1000.c
> @@ -120,7 +120,7 @@ static int gpio_halt_probe(struct platform_device *pdev)
>  
>  	/* Register our halt function */
>  	ppc_md.halt = gpio_halt_cb;
> -	ppc_md.power_off = gpio_halt_cb;
> +	pm_power_off = gpio_halt_cb;
>  
>  	printk(KERN_INFO "gpio-halt: registered GPIO %d (%d trigger, %d"
>  	       " irq).\n", gpio, trigger, irq);
> @@ -137,7 +137,7 @@ static int gpio_halt_remove(struct platform_device *pdev)
>  		free_irq(irq, halt_node);
>  
>  		ppc_md.halt = NULL;
> -		ppc_md.power_off = NULL;
> +		pm_power_off = NULL;
>  
>  		gpio_free(gpio);
>  
> diff --git a/arch/powerpc/platforms/cell/celleb_setup.c b/arch/powerpc/platforms/cell/celleb_setup.c
> index 34e8ce2976aa..90be8ec51686 100644
> --- a/arch/powerpc/platforms/cell/celleb_setup.c
> +++ b/arch/powerpc/platforms/cell/celleb_setup.c
> @@ -142,6 +142,7 @@ static int __init celleb_probe_beat(void)
>  	powerpc_firmware_features |= FW_FEATURE_CELLEB_ALWAYS
>  		| FW_FEATURE_BEAT | FW_FEATURE_LPAR;
>  	hpte_init_beat_v3();
> +	pm_power_off = beat_power_off;
>  
>  	return 1;
>  }
> @@ -190,6 +191,7 @@ static int __init celleb_probe_native(void)
>  
>  	powerpc_firmware_features |= FW_FEATURE_CELLEB_ALWAYS;
>  	hpte_init_native();
> +	pm_power_off = rtas_power_off;
>  
>  	return 1;
>  }
> @@ -204,7 +206,6 @@ define_machine(celleb_beat) {
>  	.setup_arch		= celleb_setup_arch_beat,
>  	.show_cpuinfo		= celleb_show_cpuinfo,
>  	.restart		= beat_restart,
> -	.power_off		= beat_power_off,
>  	.halt			= beat_halt,
>  	.get_rtc_time		= beat_get_rtc_time,
>  	.set_rtc_time		= beat_set_rtc_time,
> @@ -230,7 +231,6 @@ define_machine(celleb_native) {
>  	.setup_arch		= celleb_setup_arch_native,
>  	.show_cpuinfo		= celleb_show_cpuinfo,
>  	.restart		= rtas_restart,
> -	.power_off		= rtas_power_off,
>  	.halt			= rtas_halt,
>  	.get_boot_time		= rtas_get_boot_time,
>  	.get_rtc_time		= rtas_get_rtc_time,
> diff --git a/arch/powerpc/platforms/cell/qpace_setup.c b/arch/powerpc/platforms/cell/qpace_setup.c
> index 6e3409d590ac..d328140dc6f5 100644
> --- a/arch/powerpc/platforms/cell/qpace_setup.c
> +++ b/arch/powerpc/platforms/cell/qpace_setup.c
> @@ -127,6 +127,7 @@ static int __init qpace_probe(void)
>  		return 0;
>  
>  	hpte_init_native();
> +	pm_power_off = rtas_power_off;
>  
>  	return 1;
>  }
> @@ -137,7 +138,6 @@ define_machine(qpace) {
>  	.setup_arch		= qpace_setup_arch,
>  	.show_cpuinfo		= qpace_show_cpuinfo,
>  	.restart		= rtas_restart,
> -	.power_off		= rtas_power_off,
>  	.halt			= rtas_halt,
>  	.get_boot_time		= rtas_get_boot_time,
>  	.get_rtc_time		= rtas_get_rtc_time,
> diff --git a/arch/powerpc/platforms/cell/setup.c b/arch/powerpc/platforms/cell/setup.c
> index 6ae25fb62015..d62aa982d530 100644
> --- a/arch/powerpc/platforms/cell/setup.c
> +++ b/arch/powerpc/platforms/cell/setup.c
> @@ -259,6 +259,7 @@ static int __init cell_probe(void)
>  		return 0;
>  
>  	hpte_init_native();
> +	pm_power_off = rtas_power_off;
>  
>  	return 1;
>  }
> @@ -269,7 +270,6 @@ define_machine(cell) {
>  	.setup_arch		= cell_setup_arch,
>  	.show_cpuinfo		= cell_show_cpuinfo,
>  	.restart		= rtas_restart,
> -	.power_off		= rtas_power_off,
>  	.halt			= rtas_halt,
>  	.get_boot_time		= rtas_get_boot_time,
>  	.get_rtc_time		= rtas_get_rtc_time,
> diff --git a/arch/powerpc/platforms/chrp/setup.c b/arch/powerpc/platforms/chrp/setup.c
> index 5b77b1919fd2..860a59eb8ea2 100644
> --- a/arch/powerpc/platforms/chrp/setup.c
> +++ b/arch/powerpc/platforms/chrp/setup.c
> @@ -585,6 +585,8 @@ static int __init chrp_probe(void)
>  	DMA_MODE_READ = 0x44;
>  	DMA_MODE_WRITE = 0x48;
>  
> +	pm_power_off = rtas_power_off;
> +
>  	return 1;
>  }
>  
> @@ -597,7 +599,6 @@ define_machine(chrp) {
>  	.show_cpuinfo		= chrp_show_cpuinfo,
>  	.init_IRQ		= chrp_init_IRQ,
>  	.restart		= rtas_restart,
> -	.power_off		= rtas_power_off,
>  	.halt			= rtas_halt,
>  	.time_init		= chrp_time_init,
>  	.set_rtc_time		= chrp_set_rtc_time,
> diff --git a/arch/powerpc/platforms/embedded6xx/gamecube.c b/arch/powerpc/platforms/embedded6xx/gamecube.c
> index bd4ba5d7d568..fe0ed6ee285e 100644
> --- a/arch/powerpc/platforms/embedded6xx/gamecube.c
> +++ b/arch/powerpc/platforms/embedded6xx/gamecube.c
> @@ -67,6 +67,8 @@ static int __init gamecube_probe(void)
>  	if (!of_flat_dt_is_compatible(dt_root, "nintendo,gamecube"))
>  		return 0;
>  
> +	pm_power_off = gamecube_power_off;
> +
>  	return 1;
>  }
>  
> @@ -80,7 +82,6 @@ define_machine(gamecube) {
>  	.probe			= gamecube_probe,
>  	.init_early		= gamecube_init_early,
>  	.restart		= gamecube_restart,
> -	.power_off		= gamecube_power_off,
>  	.halt			= gamecube_halt,
>  	.init_IRQ		= flipper_pic_probe,
>  	.get_irq		= flipper_pic_get_irq,
> diff --git a/arch/powerpc/platforms/embedded6xx/linkstation.c b/arch/powerpc/platforms/embedded6xx/linkstation.c
> index 168e1d80b2e5..540eeb58d3f0 100644
> --- a/arch/powerpc/platforms/embedded6xx/linkstation.c
> +++ b/arch/powerpc/platforms/embedded6xx/linkstation.c
> @@ -147,6 +147,9 @@ static int __init linkstation_probe(void)
>  
>  	if (!of_flat_dt_is_compatible(root, "linkstation"))
>  		return 0;
> +
> +	pm_power_off = linkstation_power_off;
> +
>  	return 1;
>  }
>  
> @@ -158,7 +161,6 @@ define_machine(linkstation){
>  	.show_cpuinfo 		= linkstation_show_cpuinfo,
>  	.get_irq 		= mpic_get_irq,
>  	.restart 		= linkstation_restart,
> -	.power_off 		= linkstation_power_off,
>  	.halt	 		= linkstation_halt,
>  	.calibrate_decr 	= generic_calibrate_decr,
>  };
> diff --git a/arch/powerpc/platforms/embedded6xx/wii.c b/arch/powerpc/platforms/embedded6xx/wii.c
> index 388e29bab8f6..352592d3e44e 100644
> --- a/arch/powerpc/platforms/embedded6xx/wii.c
> +++ b/arch/powerpc/platforms/embedded6xx/wii.c
> @@ -211,6 +211,8 @@ static int __init wii_probe(void)
>  	if (!of_flat_dt_is_compatible(dt_root, "nintendo,wii"))
>  		return 0;
>  
> +	pm_power_off = wii_power_off;
> +
>  	return 1;
>  }
>  
> @@ -226,7 +228,6 @@ define_machine(wii) {
>  	.init_early		= wii_init_early,
>  	.setup_arch		= wii_setup_arch,
>  	.restart		= wii_restart,
> -	.power_off		= wii_power_off,
>  	.halt			= wii_halt,
>  	.init_IRQ		= wii_pic_probe,
>  	.get_irq		= flipper_pic_get_irq,
> diff --git a/arch/powerpc/platforms/maple/setup.c b/arch/powerpc/platforms/maple/setup.c
> index cb1b0b35a0c6..56b85cd61aaf 100644
> --- a/arch/powerpc/platforms/maple/setup.c
> +++ b/arch/powerpc/platforms/maple/setup.c
> @@ -169,7 +169,7 @@ static void __init maple_use_rtas_reboot_and_halt_if_present(void)
>  	if (rtas_service_present("system-reboot") &&
>  	    rtas_service_present("power-off")) {
>  		ppc_md.restart = rtas_restart;
> -		ppc_md.power_off = rtas_power_off;
> +		pm_power_off = rtas_power_off;
>  		ppc_md.halt = rtas_halt;
>  	}
>  }
> @@ -312,6 +312,7 @@ static int __init maple_probe(void)
>  	alloc_dart_table();
>  
>  	hpte_init_native();
> +	pm_power_off = maple_power_off;
>  
>  	return 1;
>  }
> @@ -325,7 +326,6 @@ define_machine(maple) {
>  	.pci_irq_fixup		= maple_pci_irq_fixup,
>  	.pci_get_legacy_ide_irq	= maple_pci_get_legacy_ide_irq,
>  	.restart		= maple_restart,
> -	.power_off		= maple_power_off,
>  	.halt			= maple_halt,
>         	.get_boot_time		= maple_get_boot_time,
>         	.set_rtc_time		= maple_set_rtc_time,
> diff --git a/arch/powerpc/platforms/powermac/setup.c b/arch/powerpc/platforms/powermac/setup.c
> index b127a29ac526..713d36d45d1d 100644
> --- a/arch/powerpc/platforms/powermac/setup.c
> +++ b/arch/powerpc/platforms/powermac/setup.c
> @@ -632,6 +632,8 @@ static int __init pmac_probe(void)
>  	smu_cmdbuf_abs = memblock_alloc_base(4096, 4096, 0x80000000UL);
>  #endif /* CONFIG_PMAC_SMU */
>  
> +	pm_power_off = pmac_power_off;
> +
>  	return 1;
>  }
>  
> @@ -663,7 +665,6 @@ define_machine(powermac) {
>  	.get_irq		= NULL,	/* changed later */
>  	.pci_irq_fixup		= pmac_pci_irq_fixup,
>  	.restart		= pmac_restart,
> -	.power_off		= pmac_power_off,
>  	.halt			= pmac_halt,
>  	.time_init		= pmac_time_init,
>  	.get_boot_time		= pmac_get_boot_time,
> diff --git a/arch/powerpc/platforms/powernv/setup.c b/arch/powerpc/platforms/powernv/setup.c
> index 3f9546d8a51f..941831d67cb2 100644
> --- a/arch/powerpc/platforms/powernv/setup.c
> +++ b/arch/powerpc/platforms/powernv/setup.c
> @@ -268,7 +268,7 @@ static void __init pnv_setup_machdep_opal(void)
>  	ppc_md.get_rtc_time = opal_get_rtc_time;
>  	ppc_md.set_rtc_time = opal_set_rtc_time;
>  	ppc_md.restart = pnv_restart;
> -	ppc_md.power_off = pnv_power_off;
> +	pm_power_off = pnv_power_off;
>  	ppc_md.halt = pnv_halt;
>  	ppc_md.machine_check_exception = opal_machine_check;
>  	ppc_md.mce_check_early_recovery = opal_mce_check_early_recovery;
> @@ -285,7 +285,7 @@ static void __init pnv_setup_machdep_rtas(void)
>  		ppc_md.set_rtc_time = rtas_set_rtc_time;
>  	}
>  	ppc_md.restart = rtas_restart;
> -	ppc_md.power_off = rtas_power_off;
> +	pm_power_off = rtas_power_off;
>  	ppc_md.halt = rtas_halt;
>  }
>  #endif /* CONFIG_PPC_POWERNV_RTAS */
> diff --git a/arch/powerpc/platforms/ps3/setup.c b/arch/powerpc/platforms/ps3/setup.c
> index 3f509f86432c..009a2004b876 100644
> --- a/arch/powerpc/platforms/ps3/setup.c
> +++ b/arch/powerpc/platforms/ps3/setup.c
> @@ -248,6 +248,7 @@ static int __init ps3_probe(void)
>  	ps3_mm_init();
>  	ps3_mm_vas_create(&htab_size);
>  	ps3_hpte_init(htab_size);
> +	pm_power_off = ps3_power_off;
>  
>  	DBG(" <- %s:%d\n", __func__, __LINE__);
>  	return 1;
> @@ -278,7 +279,6 @@ define_machine(ps3) {
>  	.calibrate_decr			= ps3_calibrate_decr,
>  	.progress			= ps3_progress,
>  	.restart			= ps3_restart,
> -	.power_off			= ps3_power_off,
>  	.halt				= ps3_halt,
>  #if defined(CONFIG_KEXEC)
>  	.kexec_cpu_down			= ps3_kexec_cpu_down,
> diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
> index 125c589eeef5..db0fc0c07568 100644
> --- a/arch/powerpc/platforms/pseries/setup.c
> +++ b/arch/powerpc/platforms/pseries/setup.c
> @@ -659,6 +659,34 @@ static void __init pSeries_init_early(void)
>  	pr_debug(" <- pSeries_init_early()\n");
>  }
>  
> +/**
> + * pseries_power_off - tell firmware about how to power off the system.
> + *
> + * This function calls either the power-off rtas token in normal cases
> + * or the ibm,power-off-ups token (if present & requested) in case of
> + * a power failure. If power-off token is used, power on will only be
> + * possible with power button press. If ibm,power-off-ups token is used
> + * it will allow auto poweron after power is restored.
> + */
> +static void pseries_power_off(void)
> +{
> +	int rc;
> +	int rtas_poweroff_ups_token = rtas_token("ibm,power-off-ups");
> +
> +	if (rtas_flash_term_hook)
> +		rtas_flash_term_hook(SYS_POWER_OFF);
> +
> +	if (rtas_poweron_auto == 0 ||
> +		rtas_poweroff_ups_token == RTAS_UNKNOWN_SERVICE) {
> +		rc = rtas_call(rtas_token("power-off"), 2, 1, NULL, -1, -1);
> +		printk(KERN_INFO "RTAS power-off returned %d\n", rc);
> +	} else {
> +		rc = rtas_call(rtas_poweroff_ups_token, 0, 1, NULL);
> +		printk(KERN_INFO "RTAS ibm,power-off-ups returned %d\n", rc);
> +	}
> +	for (;;);
> +}
> +
>  /*
>   * Called very early, MMU is off, device-tree isn't unflattened
>   */
> @@ -741,6 +769,8 @@ static int __init pSeries_probe(void)
>  	else
>  		hpte_init_native();
>  
> +	pm_power_off = pseries_power_off;
> +
>  	pr_debug("Machine is%s LPAR !\n",
>  	         (powerpc_firmware_features & FW_FEATURE_LPAR) ? "" : " not");
>  
> @@ -754,34 +784,6 @@ static int pSeries_pci_probe_mode(struct pci_bus *bus)
>  	return PCI_PROBE_NORMAL;
>  }
>  
> -/**
> - * pSeries_power_off - tell firmware about how to power off the system.
> - *
> - * This function calls either the power-off rtas token in normal cases
> - * or the ibm,power-off-ups token (if present & requested) in case of
> - * a power failure. If power-off token is used, power on will only be
> - * possible with power button press. If ibm,power-off-ups token is used
> - * it will allow auto poweron after power is restored.
> - */
> -static void pSeries_power_off(void)
> -{
> -	int rc;
> -	int rtas_poweroff_ups_token = rtas_token("ibm,power-off-ups");
> -
> -	if (rtas_flash_term_hook)
> -		rtas_flash_term_hook(SYS_POWER_OFF);
> -
> -	if (rtas_poweron_auto == 0 ||
> -		rtas_poweroff_ups_token == RTAS_UNKNOWN_SERVICE) {
> -		rc = rtas_call(rtas_token("power-off"), 2, 1, NULL, -1, -1);
> -		printk(KERN_INFO "RTAS power-off returned %d\n", rc);
> -	} else {
> -		rc = rtas_call(rtas_poweroff_ups_token, 0, 1, NULL);
> -		printk(KERN_INFO "RTAS ibm,power-off-ups returned %d\n", rc);
> -	}
> -	for (;;);
> -}
> -
>  #ifndef CONFIG_PCI
>  void pSeries_final_fixup(void) { }
>  #endif
> @@ -796,7 +798,6 @@ define_machine(pseries) {
>  	.pcibios_fixup		= pSeries_final_fixup,
>  	.pci_probe_mode		= pSeries_pci_probe_mode,
>  	.restart		= rtas_restart,
> -	.power_off		= pSeries_power_off,
>  	.halt			= rtas_halt,
>  	.panic			= rtas_os_term,
>  	.get_boot_time		= rtas_get_boot_time,
> diff --git a/arch/powerpc/sysdev/fsl_soc.c b/arch/powerpc/sysdev/fsl_soc.c
> index ffd1169ebaab..1e04568da3b9 100644
> --- a/arch/powerpc/sysdev/fsl_soc.c
> +++ b/arch/powerpc/sysdev/fsl_soc.c
> @@ -238,7 +238,7 @@ void fsl_hv_restart(char *cmd)
>  /*
>   * Halt the current partition
>   *
> - * This function should be assigned to the ppc_md.power_off and ppc_md.halt
> + * This function should be assigned to the pm_power_off and ppc_md.halt
>   * function pointers, to shut down the partition when we're running under
>   * the Freescale hypervisor.
>   */
> diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c
> index b988b5addf86..506d25681fe3 100644
> --- a/arch/powerpc/xmon/xmon.c
> +++ b/arch/powerpc/xmon/xmon.c
> @@ -981,7 +981,8 @@ static void bootcmds(void)
>  	else if (cmd == 'h')
>  		ppc_md.halt();
>  	else if (cmd == 'p')
> -		ppc_md.power_off();
> +		if (pm_power_off)
> +			pm_power_off();
>  }
>  
>  static int cpu_cmd(void)




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