Messages in this thread Patch in this message | | | From | Guenter Roeck <> | Subject | [PATCH v6 31/48] x86: apm: Register with kernel power-off handler | Date | Sun, 9 Nov 2014 17:42:48 -0800 |
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Register with kernel power-off handler instead of setting pm_power_off directly. Register with high priority to reflect that the original code overwrites existing power-off handlers.
Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Jiri Kosina <jkosina@suse.cz> Acked-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Jiri Kosina <jkosina@suse.cz> Signed-off-by: Guenter Roeck <linux@roeck-us.net> --- v6: - This patch: No change. Global: Replaced priority defines with enum. v5: - Rebase to v3.18-rc3 v4: - Do not use notifiers but internal functions and data structures to manage the list of power-off handlers. Drop unused parameters from callbacks, and make the power-off function type void v3: - Replace poweroff in all newly introduced variables and in text with power_off or power-off as appropriate - Replace POWEROFF_PRIORITY_xxx with POWER_OFF_PRIORITY_xxx v2: - Use define to specify poweroff handler priority
arch/x86/kernel/apm_32.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-)
diff --git a/arch/x86/kernel/apm_32.c b/arch/x86/kernel/apm_32.c index 5848744..04910de 100644 --- a/arch/x86/kernel/apm_32.c +++ b/arch/x86/kernel/apm_32.c @@ -981,7 +981,7 @@ recalc: * on their first cpu. */ -static void apm_power_off(void) +static void apm_power_off(struct power_off_handler_block *this) { /* Some bioses don't like being called from CPU != 0 */ if (apm_info.realmode_power_off) { @@ -992,6 +992,11 @@ static void apm_power_off(void) } } +static struct power_off_handler_block apm_power_off_hb = { + .handler = apm_power_off, + .priority = POWER_OFF_PRIORITY_HIGH, +}; + #ifdef CONFIG_APM_DO_ENABLE /** @@ -1847,8 +1852,11 @@ static int apm(void *unused) } /* Install our power off handler.. */ - if (power_off) - pm_power_off = apm_power_off; + if (power_off) { + error = register_power_off_handler(&apm_power_off_hb); + if (error) + pr_warn("apm: Failed to register power-off handler\n"); + } if (num_online_cpus() == 1 || smp) { #if defined(CONFIG_APM_DISPLAY_BLANK) && defined(CONFIG_VT) @@ -2408,9 +2416,8 @@ static void __exit apm_exit(void) apm_error("disengage power management", error); } misc_deregister(&apm_device); + unregister_power_off_handler(&apm_power_off_hb); remove_proc_entry("apm", NULL); - if (power_off) - pm_power_off = NULL; if (kapmd_task) { kthread_stop(kapmd_task); kapmd_task = NULL; -- 1.9.1
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