[v5,08/48] kernel: Move pm_power_off to common code

Message ID	1415292213-28652-9-git-send-email-linux@roeck-us.net (mailing list archive)
State	New, archived
Headers	show Return-Path: <linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org> From: Guenter Roeck <linux@roeck-us.net> To: linux-kernel@vger.kernel.org Subject: [PATCH v5 08/48] kernel: Move pm_power_off to common code Date: Thu, 6 Nov 2014 08:42:52 -0800 Message-Id: <1415292213-28652-9-git-send-email-linux@roeck-us.net> In-Reply-To: <1415292213-28652-1-git-send-email-linux@roeck-us.net> References: <1415292213-28652-1-git-send-email-linux@roeck-us.net> X-Authenticated_sender: guenter@roeck-us.net Cc: linux-mips@linux-mips.org, linux-ia64@vger.kernel.org, linux-sh@vger.kernel.org, linux@lists.openrisc.net, sparclinux@vger.kernel.org, linux-s390@vger.kernel.org, linux-am33-list@redhat.com, linux-c6x-dev@linux-c6x.org, linux-hexagon@vger.kernel.org, x86@kernel.org, xen-devel@lists.xenproject.org, Guenter Roeck <linux@roeck-us.net>, linux-xtensa@linux-xtensa.org, user-mode-linux-devel@lists.sourceforge.net, linux-pm@vger.kernel.org, adi-buildroot-devel@lists.sourceforge.net, linux-m68k@lists.linux-m68k.org, user-mode-linux-user@lists.sourceforge.net, linux-metag@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-parisc@vger.kernel.org, linux-cris-kernel@axis.com, linux-alpha@vger.kernel.org, linux390@de.ibm.com, linuxppc-dev@lists.ozlabs.org Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" <linux-arm-kernel-bounces@lists.infradead.org> Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org

diff --git a/arch/alpha/kernel/process.c b/arch/alpha/kernel/process.c index 1941a07..81c43f8 100644 --- a/arch/alpha/kernel/process.c +++ b/arch/alpha/kernel/process.c @@ -24,6 +24,7 @@ #include <linux/vt.h> #include <linux/mman.h> #include <linux/elfcore.h> +#include <linux/pm.h> #include <linux/reboot.h> #include <linux/tty.h> #include <linux/console.h> @@ -40,12 +41,6 @@ #include "proto.h" #include "pci_impl.h" -/* - * Power off function, if any - */ -void (*pm_power_off)(void) = machine_power_off; -EXPORT_SYMBOL(pm_power_off); - #ifdef CONFIG_ALPHA_WTINT /* * Sleep the CPU. @@ -184,6 +179,8 @@ machine_halt(void) void machine_power_off(void) { + do_kernel_power_off(); + common_shutdown(LINUX_REBOOT_CMD_POWER_OFF, NULL); } diff --git a/arch/arc/kernel/reset.c b/arch/arc/kernel/reset.c index 2768fa1..0758d9d 100644 --- a/arch/arc/kernel/reset.c +++ b/arch/arc/kernel/reset.c @@ -26,9 +26,6 @@ void machine_restart(char *__unused) void machine_power_off(void) { - /* FIXME :: power off ??? */ + do_kernel_power_off(); machine_halt(); } - -void (*pm_power_off) (void) = NULL; -EXPORT_SYMBOL(pm_power_off); diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c index fe972a2..aa3f656 100644 --- a/arch/arm/kernel/process.c +++ b/arch/arm/kernel/process.c @@ -117,8 +117,6 @@ void soft_restart(unsigned long addr) /* * Function pointers to optional machine specific functions */ -void (*pm_power_off)(void); -EXPORT_SYMBOL(pm_power_off); void (*arm_pm_restart)(enum reboot_mode reboot_mode, const char *cmd); @@ -205,8 +203,7 @@ void machine_power_off(void) local_irq_disable(); smp_send_stop(); - if (pm_power_off) - pm_power_off(); + do_kernel_power_off(); } /* diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index fde9923..6f623a0 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -68,8 +68,6 @@ void soft_restart(unsigned long addr) /* * Function pointers to optional machine specific functions */ -void (*pm_power_off)(void); -EXPORT_SYMBOL_GPL(pm_power_off); void (*arm_pm_restart)(enum reboot_mode reboot_mode, const char *cmd); @@ -129,8 +127,7 @@ void machine_power_off(void) { local_irq_disable(); smp_send_stop(); - if (pm_power_off) - pm_power_off(); + do_kernel_power_off(); } /* diff --git a/arch/avr32/kernel/process.c b/arch/avr32/kernel/process.c index 42a53e74..529c1f6 100644 --- a/arch/avr32/kernel/process.c +++ b/arch/avr32/kernel/process.c @@ -23,9 +23,6 @@ #include <mach/pm.h> -void (*pm_power_off)(void); -EXPORT_SYMBOL(pm_power_off); - /* * This file handles the architecture-dependent parts of process handling.. */ @@ -48,8 +45,7 @@ void machine_halt(void) void machine_power_off(void) { - if (pm_power_off) - pm_power_off(); + do_kernel_power_off(); } void machine_restart(char *cmd) diff --git a/arch/blackfin/kernel/process.c b/arch/blackfin/kernel/process.c index 4aa5545..812dd83 100644 --- a/arch/blackfin/kernel/process.c +++ b/arch/blackfin/kernel/process.c @@ -39,9 +39,6 @@ int nr_l1stack_tasks; void *l1_stack_base; unsigned long l1_stack_len; -void (*pm_power_off)(void) = NULL; -EXPORT_SYMBOL(pm_power_off); - /* * The idle loop on BFIN */ diff --git a/arch/blackfin/kernel/reboot.c b/arch/blackfin/kernel/reboot.c index c4f50a3..387d610 100644 --- a/arch/blackfin/kernel/reboot.c +++ b/arch/blackfin/kernel/reboot.c @@ -7,6 +7,7 @@ */ #include <linux/interrupt.h> +#include <linux/pm.h> #include <asm/bfin-global.h> #include <asm/reboot.h> #include <asm/bfrom.h> @@ -106,6 +107,7 @@ void machine_halt(void) __attribute__((weak)) void native_machine_power_off(void) { + do_kernel_power_off(); idle_with_irq_disabled(); } diff --git a/arch/c6x/kernel/process.c b/arch/c6x/kernel/process.c index 57d2ea8..edf7e5a 100644 --- a/arch/c6x/kernel/process.c +++ b/arch/c6x/kernel/process.c @@ -27,12 +27,6 @@ void (*c6x_halt)(void); extern asmlinkage void ret_from_fork(void); extern asmlinkage void ret_from_kernel_thread(void); -/* - * power off function, if any - */ -void (*pm_power_off)(void); -EXPORT_SYMBOL(pm_power_off); - void arch_cpu_idle(void) { unsigned long tmp; @@ -73,8 +67,7 @@ void machine_halt(void) void machine_power_off(void) { - if (pm_power_off) - pm_power_off(); + do_kernel_power_off(); halt_loop(); } diff --git a/arch/cris/kernel/process.c b/arch/cris/kernel/process.c index b78498e..9ebd76b 100644 --- a/arch/cris/kernel/process.c +++ b/arch/cris/kernel/process.c @@ -31,9 +31,6 @@ extern void default_idle(void); -void (*pm_power_off)(void); -EXPORT_SYMBOL(pm_power_off); - void arch_cpu_idle(void) { default_idle(); @@ -60,6 +57,7 @@ void machine_halt(void) void machine_power_off(void) { + do_kernel_power_off(); } /* diff --git a/arch/frv/kernel/process.c b/arch/frv/kernel/process.c index 5d40aeb77..502dabb 100644 --- a/arch/frv/kernel/process.c +++ b/arch/frv/kernel/process.c @@ -42,9 +42,6 @@ asmlinkage void ret_from_kernel_thread(void); #include <asm/pgalloc.h> -void (*pm_power_off)(void); -EXPORT_SYMBOL(pm_power_off); - static void core_sleep_idle(void) { #ifdef LED_DEBUG_SLEEP @@ -107,6 +104,8 @@ void machine_power_off(void) gdbstub_exit(0); #endif + do_kernel_power_off(); + for (;;); } diff --git a/arch/hexagon/kernel/reset.c b/arch/hexagon/kernel/reset.c index 76483c1..6f607b6 100644 --- a/arch/hexagon/kernel/reset.c +++ b/arch/hexagon/kernel/reset.c @@ -16,11 +16,13 @@ * 02110-1301, USA. */ +#include <linux/pm.h> #include <linux/smp.h> #include <asm/hexagon_vm.h> void machine_power_off(void) { + do_kernel_power_off(); smp_send_stop(); __vmstop(); } @@ -32,6 +34,3 @@ void machine_halt(void) void machine_restart(char *cmd) { } - -void (*pm_power_off)(void) = NULL; -EXPORT_SYMBOL(pm_power_off); diff --git a/arch/ia64/kernel/process.c b/arch/ia64/kernel/process.c index b515149..88121a2 100644 --- a/arch/ia64/kernel/process.c +++ b/arch/ia64/kernel/process.c @@ -57,8 +57,6 @@ void (*ia64_mark_idle)(int); unsigned long boot_option_idle_override = IDLE_NO_OVERRIDE; EXPORT_SYMBOL(boot_option_idle_override); -void (*pm_power_off) (void); -EXPORT_SYMBOL(pm_power_off); void ia64_do_show_stack (struct unw_frame_info *info, void *arg) @@ -675,8 +673,7 @@ machine_halt (void) void machine_power_off (void) { - if (pm_power_off) - pm_power_off(); + do_kernel_power_off(); machine_halt(); } diff --git a/arch/m32r/kernel/process.c b/arch/m32r/kernel/process.c index e69221d..65a037e 100644 --- a/arch/m32r/kernel/process.c +++ b/arch/m32r/kernel/process.c @@ -23,6 +23,7 @@ #include <linux/fs.h> #include <linux/slab.h> #include <linux/module.h> +#include <linux/pm.h> #include <linux/ptrace.h> #include <linux/unistd.h> #include <linux/hardirq.h> @@ -44,9 +45,6 @@ unsigned long thread_saved_pc(struct task_struct *tsk) return tsk->thread.lr; } -void (*pm_power_off)(void) = NULL; -EXPORT_SYMBOL(pm_power_off); - void machine_restart(char *__unused) { #if defined(CONFIG_PLAT_MAPPI3) @@ -67,7 +65,9 @@ void machine_halt(void) void machine_power_off(void) { - /* M32R_FIXME */ + do_kernel_power_off(); + for (;;) + ; } void show_regs(struct pt_regs * regs) diff --git a/arch/m68k/kernel/process.c b/arch/m68k/kernel/process.c index afe3d6e..bbc0a63 100644 --- a/arch/m68k/kernel/process.c +++ b/arch/m68k/kernel/process.c @@ -78,14 +78,10 @@ void machine_halt(void) void machine_power_off(void) { - if (pm_power_off) - pm_power_off(); + do_kernel_power_off(); for (;;); } -void (*pm_power_off)(void) = machine_power_off; -EXPORT_SYMBOL(pm_power_off); - void show_regs(struct pt_regs * regs) { printk("\n"); diff --git a/arch/metag/kernel/process.c b/arch/metag/kernel/process.c index 483dff9..8d95773 100644 --- a/arch/metag/kernel/process.c +++ b/arch/metag/kernel/process.c @@ -67,9 +67,6 @@ void arch_cpu_idle_dead(void) } #endif -void (*pm_power_off)(void); -EXPORT_SYMBOL(pm_power_off); - void (*soc_restart)(char *cmd); void (*soc_halt)(void); @@ -90,8 +87,7 @@ void machine_halt(void) void machine_power_off(void) { - if (pm_power_off) - pm_power_off(); + do_kernel_power_off(); smp_send_stop(); hard_processor_halt(HALT_OK); } diff --git a/arch/microblaze/kernel/process.c b/arch/microblaze/kernel/process.c index b2dd371..0ebca36 100644 --- a/arch/microblaze/kernel/process.c +++ b/arch/microblaze/kernel/process.c @@ -44,9 +44,6 @@ void show_regs(struct pt_regs *regs) regs->msr, regs->ear, regs->esr, regs->fsr); } -void (*pm_power_off)(void) = NULL; -EXPORT_SYMBOL(pm_power_off); - void flush_thread(void) { } diff --git a/arch/microblaze/kernel/reset.c b/arch/microblaze/kernel/reset.c index fbe58c6..2c6b32c 100644 --- a/arch/microblaze/kernel/reset.c +++ b/arch/microblaze/kernel/reset.c @@ -103,6 +103,7 @@ void machine_halt(void) void machine_power_off(void) { pr_notice("Machine power off...\n"); + do_kernel_power_off(); while (1) ; } diff --git a/arch/mips/kernel/reset.c b/arch/mips/kernel/reset.c index 07fc524..09e74d2 100644 --- a/arch/mips/kernel/reset.c +++ b/arch/mips/kernel/reset.c @@ -21,9 +21,6 @@ */ void (*_machine_restart)(char *command); void (*_machine_halt)(void); -void (*pm_power_off)(void); - -EXPORT_SYMBOL(pm_power_off); void machine_restart(char *command) { @@ -39,6 +36,5 @@ void machine_halt(void) void machine_power_off(void) { - if (pm_power_off) - pm_power_off(); + do_kernel_power_off(); } diff --git a/arch/mn10300/kernel/process.c b/arch/mn10300/kernel/process.c index 3707da5..c78b2eb 100644 --- a/arch/mn10300/kernel/process.c +++ b/arch/mn10300/kernel/process.c @@ -20,6 +20,7 @@ #include <linux/user.h> #include <linux/interrupt.h> #include <linux/delay.h> +#include <linux/pm.h> #include <linux/reboot.h> #include <linux/percpu.h> #include <linux/err.h> @@ -45,12 +46,6 @@ unsigned long thread_saved_pc(struct task_struct *tsk) } /* - * power off function, if any - */ -void (*pm_power_off)(void); -EXPORT_SYMBOL(pm_power_off); - -/* * On SMP it's slightly faster (but much more power-consuming!) * to poll the ->work.need_resched flag instead of waiting for the * cross-CPU IPI to arrive. Use this option with caution. @@ -93,6 +88,7 @@ void machine_power_off(void) #ifdef CONFIG_KERNEL_DEBUGGER gdbstub_exit(0); #endif + do_kernel_power_off(); } void show_regs(struct pt_regs *regs) diff --git a/arch/openrisc/kernel/process.c b/arch/openrisc/kernel/process.c index 386af25..494afd2 100644 --- a/arch/openrisc/kernel/process.c +++ b/arch/openrisc/kernel/process.c @@ -25,6 +25,7 @@ #include <linux/kernel.h> #include <linux/module.h> #include <linux/mm.h> +#include <linux/pm.h> #include <linux/stddef.h> #include <linux/unistd.h> #include <linux/ptrace.h> @@ -51,7 +52,7 @@ */ struct thread_info *current_thread_info_set[NR_CPUS] = { &init_thread_info, }; -void machine_restart(void) +void machine_restart(char *cmd) { printk(KERN_INFO "*** MACHINE RESTART ***\n"); __asm__("l.nop 1"); @@ -72,11 +73,12 @@ void machine_halt(void) void machine_power_off(void) { printk(KERN_INFO "*** MACHINE POWER OFF ***\n"); + + do_kernel_power_off(); + __asm__("l.nop 1"); } -void (*pm_power_off) (void) = machine_power_off; - /* * When a process does an "exec", machine state like FPU and debug * registers need to be reset. This is a hook function for that. diff --git a/arch/parisc/kernel/process.c b/arch/parisc/kernel/process.c index 0bbbf0d..3f5d14a 100644 --- a/arch/parisc/kernel/process.c +++ b/arch/parisc/kernel/process.c @@ -41,6 +41,7 @@ #include <linux/fs.h> #include <linux/module.h> #include <linux/personality.h> +#include <linux/pm.h> #include <linux/ptrace.h> #include <linux/sched.h> #include <linux/slab.h> @@ -133,7 +134,9 @@ void machine_power_off(void) pdc_soft_power_button(0); pdc_chassis_send_status(PDC_CHASSIS_DIRECT_SHUTDOWN); - + + do_kernel_power_off(); + /* It seems we have no way to power the system off via * software. The user has to press the button himself. */ @@ -141,9 +144,6 @@ void machine_power_off(void) "Please power this system off now."); } -void (*pm_power_off)(void) = machine_power_off; -EXPORT_SYMBOL(pm_power_off); - /* * Free current thread data structures etc.. */ diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c index 44c8d03..a2efce7 100644 --- a/arch/powerpc/kernel/setup-common.c +++ b/arch/powerpc/kernel/setup-common.c @@ -139,8 +139,7 @@ void machine_restart(char *cmd) void machine_power_off(void) { machine_shutdown(); - if (pm_power_off) - pm_power_off(); + do_kernel_power_off(); #ifdef CONFIG_SMP smp_send_stop(); #endif @@ -151,9 +150,6 @@ void machine_power_off(void) /* Used by the G5 thermal driver */ EXPORT_SYMBOL_GPL(machine_power_off); -void (*pm_power_off)(void); -EXPORT_SYMBOL_GPL(pm_power_off); - void machine_halt(void) { machine_shutdown(); diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c index 506d256..8780178 100644 --- a/arch/powerpc/xmon/xmon.c +++ b/arch/powerpc/xmon/xmon.c @@ -981,8 +981,7 @@ static void bootcmds(void) else if (cmd == 'h') ppc_md.halt(); else if (cmd == 'p') - if (pm_power_off) - pm_power_off(); + do_kernel_power_off(); } static int cpu_cmd(void) diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index e80d9ff..267e025 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -263,13 +263,9 @@ void machine_power_off(void) */ console_unblank(); _machine_power_off(); -} -/* - * Dummy power off function. - */ -void (*pm_power_off)(void) = machine_power_off; -EXPORT_SYMBOL_GPL(pm_power_off); + do_kernel_power_off(); +} static int __init early_parse_mem(char *p) { diff --git a/arch/score/kernel/process.c b/arch/score/kernel/process.c index a1519ad3..b76ea67 100644 --- a/arch/score/kernel/process.c +++ b/arch/score/kernel/process.c @@ -29,9 +29,6 @@ #include <linux/pm.h> #include <linux/rcupdate.h> -void (*pm_power_off)(void); -EXPORT_SYMBOL(pm_power_off); - /* If or when software machine-restart is implemented, add code here. */ void machine_restart(char *command) {} @@ -39,7 +36,10 @@ void machine_restart(char *command) {} void machine_halt(void) {} /* If or when software machine-power-off is implemented, add code here. */ -void machine_power_off(void) {} +void machine_power_off(void) +{ + do_kernel_power_off(); +} void ret_from_fork(void); void ret_from_kernel_thread(void); diff --git a/arch/sh/kernel/reboot.c b/arch/sh/kernel/reboot.c index 04afe5b..065de12 100644 --- a/arch/sh/kernel/reboot.c +++ b/arch/sh/kernel/reboot.c @@ -11,9 +11,6 @@ #include <asm/tlbflush.h> #include <asm/traps.h> -void (*pm_power_off)(void); -EXPORT_SYMBOL(pm_power_off); - #ifdef CONFIG_SUPERH32 static void watchdog_trigger_immediate(void) { @@ -51,8 +48,7 @@ static void native_machine_shutdown(void) static void native_machine_power_off(void) { - if (pm_power_off) - pm_power_off(); + do_kernel_power_off(); } static void native_machine_halt(void) diff --git a/arch/sparc/kernel/process_32.c b/arch/sparc/kernel/process_32.c index 50e7b62..cb8148a 100644 --- a/arch/sparc/kernel/process_32.c +++ b/arch/sparc/kernel/process_32.c @@ -48,14 +48,6 @@ */ void (*sparc_idle)(void); -/* - * Power-off handler instantiation for pm.h compliance - * This is done via auxio, but could be used as a fallback - * handler when auxio is not present-- unused for now... - */ -void (*pm_power_off)(void) = machine_power_off; -EXPORT_SYMBOL(pm_power_off); - /* * sysctl - toggle power-off restriction for serial console * systems in machine_power_off() @@ -112,6 +104,8 @@ void machine_power_off(void) sbus_writeb(power_register, auxio_power_register); } + do_kernel_power_off(); + machine_halt(); } diff --git a/arch/sparc/kernel/reboot.c b/arch/sparc/kernel/reboot.c index eba7d91..3c0bb03 100644 --- a/arch/sparc/kernel/reboot.c +++ b/arch/sparc/kernel/reboot.c @@ -16,17 +16,13 @@ */ int scons_pwroff = 1; -/* This isn't actually used, it exists merely to satisfy the - * reference in kernel/sys.c - */ -void (*pm_power_off)(void) = machine_power_off; -EXPORT_SYMBOL(pm_power_off); - void machine_power_off(void) { if (strcmp(of_console_device->type, "serial") || scons_pwroff) prom_halt_power_off(); + do_kernel_power_off(); + prom_halt(); } diff --git a/arch/tile/kernel/reboot.c b/arch/tile/kernel/reboot.c index 6c5d2c0..8ff4a7f 100644 --- a/arch/tile/kernel/reboot.c +++ b/arch/tile/kernel/reboot.c @@ -36,6 +36,9 @@ void machine_power_off(void) { arch_local_irq_disable_all(); smp_send_stop(); + + do_kernel_power_off(); + hv_power_off(); } @@ -45,7 +48,3 @@ void machine_restart(char *cmd) smp_send_stop(); hv_restart((HV_VirtAddr) "vmlinux", (HV_VirtAddr) cmd); } - -/* No interesting distinction to be made here. */ -void (*pm_power_off)(void) = NULL; -EXPORT_SYMBOL(pm_power_off); diff --git a/arch/um/kernel/reboot.c b/arch/um/kernel/reboot.c index ced8903..a82ef28 100644 --- a/arch/um/kernel/reboot.c +++ b/arch/um/kernel/reboot.c @@ -11,8 +11,6 @@ #include <os.h> #include <skas.h> -void (*pm_power_off)(void); - static void kill_off_processes(void) { if (proc_mm) diff --git a/arch/unicore32/kernel/process.c b/arch/unicore32/kernel/process.c index b008e99..9490dd5 100644 --- a/arch/unicore32/kernel/process.c +++ b/arch/unicore32/kernel/process.c @@ -56,16 +56,9 @@ void machine_halt(void) gpio_set_value(GPO_SOFT_OFF, 0); } -/* - * Function pointers to optional machine specific functions - */ -void (*pm_power_off)(void) = NULL; -EXPORT_SYMBOL(pm_power_off); - void machine_power_off(void) { - if (pm_power_off) - pm_power_off(); + do_kernel_power_off(); machine_halt(); } diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c index 17962e6..5c09e28 100644 --- a/arch/x86/kernel/reboot.c +++ b/arch/x86/kernel/reboot.c @@ -30,12 +30,6 @@ #include <asm/x86_init.h> #include <asm/efi.h> -/* - * Power off function, if any - */ -void (*pm_power_off)(void); -EXPORT_SYMBOL(pm_power_off); - static const struct desc_ptr no_idt = {}; /* @@ -647,11 +641,12 @@ static void native_machine_halt(void) static void native_machine_power_off(void) { - if (pm_power_off) { + if (have_kernel_power_off()) { if (!reboot_force) machine_shutdown(); - pm_power_off(); + do_kernel_power_off(); } + /* A fallback in case there is no PM info available */ tboot_shutdown(TB_SHUTDOWN_HALT); } diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c index fac5e4f..bc08998 100644 --- a/arch/x86/xen/enlighten.c +++ b/arch/x86/xen/enlighten.c @@ -1320,8 +1320,7 @@ static void xen_machine_halt(void) static void xen_machine_power_off(void) { - if (pm_power_off) - pm_power_off(); + do_kernel_power_off(); xen_reboot(SHUTDOWN_poweroff); } diff --git a/arch/xtensa/kernel/process.c b/arch/xtensa/kernel/process.c index 1c85323..c487296 100644 --- a/arch/xtensa/kernel/process.c +++ b/arch/xtensa/kernel/process.c @@ -49,10 +49,6 @@ extern void ret_from_kernel_thread(void); struct task_struct *current_set[NR_CPUS] = {&init_task, }; -void (*pm_power_off)(void) = NULL; -EXPORT_SYMBOL(pm_power_off); - - #if XTENSA_HAVE_COPROCESSORS void coprocessor_release_all(struct thread_info *ti) diff --git a/drivers/parisc/power.c b/drivers/parisc/power.c index ef31b77..f10cf92 100644 --- a/drivers/parisc/power.c +++ b/drivers/parisc/power.c @@ -95,8 +95,7 @@ static void process_shutdown(void) /* send kill signal */ if (kill_cad_pid(SIGINT, 1)) { /* just in case killing init process failed */ - if (pm_power_off) - pm_power_off(); + kernel_power_off(); } } } diff --git a/kernel/power/power_off_handler.c b/kernel/power/power_off_handler.c index e576534..e283ea1 100644 --- a/kernel/power/power_off_handler.c +++ b/kernel/power/power_off_handler.c @@ -23,6 +23,12 @@ #include <linux/types.h> /* + * If set, calling this function will power off the system immediately. + */ +void (*pm_power_off)(void); +EXPORT_SYMBOL(pm_power_off); + +/* * List of handlers for kernel code which wants to be called * to power off the system. */ @@ -272,6 +278,9 @@ void do_kernel_power_off(void) * that risk. */ + if (pm_power_off) + pm_power_off(); + p = rcu_dereference_raw(power_off_handler_list); while (p) { next_p = rcu_dereference_raw(p->next); diff --git a/kernel/reboot.c b/kernel/reboot.c index 5925f5a..d87d921 100644 --- a/kernel/reboot.c +++ b/kernel/reboot.c @@ -306,9 +306,9 @@ SYSCALL_DEFINE4(reboot, int, magic1, int, magic2, unsigned int, cmd, return ret; /* Instead of trying to make the power_off code look like - * halt when pm_power_off is not set do it the easy way. + * halt when no power-off handler exists do it the easy way. */ - if ((cmd == LINUX_REBOOT_CMD_POWER_OFF) && !pm_power_off) + if (cmd == LINUX_REBOOT_CMD_POWER_OFF && !have_kernel_power_off()) cmd = LINUX_REBOOT_CMD_HALT; mutex_lock(&reboot_mutex);

[v5,08/48] kernel: Move pm_power_off to common code

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Patch