From: Mike Travis Date: Mon, 9 Jun 2008 23:22:23 +0000 (-0700) Subject: ACPI: change processors from array to per_cpu variable X-Git-Tag: v2.6.27-rc1~1050^2~82 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=706546d02384b64e083bd9130c56eaa599c66038;p=linux-2.6 ACPI: change processors from array to per_cpu variable Change processors from an array sized by NR_CPUS to a per_cpu variable. Signed-off-by: Mike Travis Signed-off-by: Andrew Morton Signed-off-by: Len Brown Signed-off-by: Andi Kleen --- diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c index feddc8ed87..9a803f85cc 100644 --- a/drivers/acpi/processor_core.c +++ b/drivers/acpi/processor_core.c @@ -118,7 +118,7 @@ static const struct file_operations acpi_processor_info_fops = { .release = single_release, }; -struct acpi_processor *processors[NR_CPUS]; +DEFINE_PER_CPU(struct acpi_processor *, processors); struct acpi_processor_errata errata __read_mostly; /* -------------------------------------------------------------------------- @@ -614,7 +614,7 @@ static int acpi_processor_get_info(struct acpi_processor *pr, unsigned has_uid) return 0; } -static void *processor_device_array[NR_CPUS]; +static DEFINE_PER_CPU(void *, processor_device_array); static int __cpuinit acpi_processor_start(struct acpi_device *device) { @@ -638,15 +638,15 @@ static int __cpuinit acpi_processor_start(struct acpi_device *device) * ACPI id of processors can be reported wrongly by the BIOS. * Don't trust it blindly */ - if (processor_device_array[pr->id] != NULL && - processor_device_array[pr->id] != device) { + if (per_cpu(processor_device_array, pr->id) != NULL && + per_cpu(processor_device_array, pr->id) != device) { printk(KERN_WARNING "BIOS reported wrong ACPI id " "for the processor\n"); return -ENODEV; } - processor_device_array[pr->id] = device; + per_cpu(processor_device_array, pr->id) = device; - processors[pr->id] = pr; + per_cpu(processors, pr->id) = pr; result = acpi_processor_add_fs(device); if (result) @@ -753,7 +753,7 @@ static int acpi_cpu_soft_notify(struct notifier_block *nfb, unsigned long action, void *hcpu) { unsigned int cpu = (unsigned long)hcpu; - struct acpi_processor *pr = processors[cpu]; + struct acpi_processor *pr = per_cpu(processors, cpu); if (action == CPU_ONLINE && pr) { acpi_processor_ppc_has_changed(pr); @@ -825,8 +825,8 @@ static int acpi_processor_remove(struct acpi_device *device, int type) pr->cdev = NULL; } - processors[pr->id] = NULL; - processor_device_array[pr->id] = NULL; + per_cpu(processors, pr->id) = NULL; + per_cpu(processor_device_array, pr->id) = NULL; kfree(pr); return 0; @@ -1074,8 +1074,6 @@ static int __init acpi_processor_init(void) { int result = 0; - - memset(&processors, 0, sizeof(processors)); memset(&errata, 0, sizeof(errata)); #ifdef CONFIG_SMP diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c index 4976e5db2b..0fc310e7df 100644 --- a/drivers/acpi/processor_idle.c +++ b/drivers/acpi/processor_idle.c @@ -401,7 +401,7 @@ static void acpi_processor_idle(void) */ local_irq_disable(); - pr = processors[smp_processor_id()]; + pr = __get_cpu_var(processors); if (!pr) { local_irq_enable(); return; @@ -1431,7 +1431,7 @@ static int acpi_idle_enter_c1(struct cpuidle_device *dev, struct acpi_processor *pr; struct acpi_processor_cx *cx = cpuidle_get_statedata(state); - pr = processors[smp_processor_id()]; + pr = __get_cpu_var(processors); if (unlikely(!pr)) return 0; @@ -1471,7 +1471,7 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev, u32 t1, t2; int sleep_ticks = 0; - pr = processors[smp_processor_id()]; + pr = __get_cpu_var(processors); if (unlikely(!pr)) return 0; @@ -1549,7 +1549,7 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev, u32 t1, t2; int sleep_ticks = 0; - pr = processors[smp_processor_id()]; + pr = __get_cpu_var(processors); if (unlikely(!pr)) return 0; diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c index d80b2d1441..b4749969c6 100644 --- a/drivers/acpi/processor_perflib.c +++ b/drivers/acpi/processor_perflib.c @@ -89,7 +89,7 @@ static int acpi_processor_ppc_notifier(struct notifier_block *nb, if (event != CPUFREQ_INCOMPATIBLE) goto out; - pr = processors[policy->cpu]; + pr = per_cpu(processors, policy->cpu); if (!pr || !pr->performance) goto out; @@ -572,7 +572,7 @@ int acpi_processor_preregister_performance( /* Call _PSD for all CPUs */ for_each_possible_cpu(i) { - pr = processors[i]; + pr = per_cpu(processors, i); if (!pr) { /* Look only at processors in ACPI namespace */ continue; @@ -603,7 +603,7 @@ int acpi_processor_preregister_performance( * domain info. */ for_each_possible_cpu(i) { - pr = processors[i]; + pr = per_cpu(processors, i); if (!pr) continue; @@ -624,7 +624,7 @@ int acpi_processor_preregister_performance( cpus_clear(covered_cpus); for_each_possible_cpu(i) { - pr = processors[i]; + pr = per_cpu(processors, i); if (!pr) continue; @@ -651,7 +651,7 @@ int acpi_processor_preregister_performance( if (i == j) continue; - match_pr = processors[j]; + match_pr = per_cpu(processors, j); if (!match_pr) continue; @@ -680,7 +680,7 @@ int acpi_processor_preregister_performance( if (i == j) continue; - match_pr = processors[j]; + match_pr = per_cpu(processors, j); if (!match_pr) continue; @@ -697,7 +697,7 @@ int acpi_processor_preregister_performance( err_ret: for_each_possible_cpu(i) { - pr = processors[i]; + pr = per_cpu(processors, i); if (!pr || !pr->performance) continue; @@ -728,7 +728,7 @@ acpi_processor_register_performance(struct acpi_processor_performance mutex_lock(&performance_mutex); - pr = processors[cpu]; + pr = per_cpu(processors, cpu); if (!pr) { mutex_unlock(&performance_mutex); return -ENODEV; @@ -766,7 +766,7 @@ acpi_processor_unregister_performance(struct acpi_processor_performance mutex_lock(&performance_mutex); - pr = processors[cpu]; + pr = per_cpu(processors, cpu); if (!pr) { mutex_unlock(&performance_mutex); return; diff --git a/drivers/acpi/processor_throttling.c b/drivers/acpi/processor_throttling.c index bb06738860..8728782aad 100644 --- a/drivers/acpi/processor_throttling.c +++ b/drivers/acpi/processor_throttling.c @@ -71,7 +71,7 @@ static int acpi_processor_update_tsd_coord(void) * coordination between all CPUs. */ for_each_possible_cpu(i) { - pr = processors[i]; + pr = per_cpu(processors, i); if (!pr) continue; @@ -93,7 +93,7 @@ static int acpi_processor_update_tsd_coord(void) cpus_clear(covered_cpus); for_each_possible_cpu(i) { - pr = processors[i]; + pr = per_cpu(processors, i); if (!pr) continue; @@ -119,7 +119,7 @@ static int acpi_processor_update_tsd_coord(void) if (i == j) continue; - match_pr = processors[j]; + match_pr = per_cpu(processors, j); if (!match_pr) continue; @@ -152,7 +152,7 @@ static int acpi_processor_update_tsd_coord(void) if (i == j) continue; - match_pr = processors[j]; + match_pr = per_cpu(processors, j); if (!match_pr) continue; @@ -172,7 +172,7 @@ static int acpi_processor_update_tsd_coord(void) err_ret: for_each_possible_cpu(i) { - pr = processors[i]; + pr = per_cpu(processors, i); if (!pr) continue; @@ -214,7 +214,7 @@ static int acpi_processor_throttling_notifier(unsigned long event, void *data) struct acpi_processor_throttling *p_throttling; cpu = p_tstate->cpu; - pr = processors[cpu]; + pr = per_cpu(processors, cpu); if (!pr) { ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Invalid pr pointer\n")); return 0; @@ -1035,7 +1035,7 @@ int acpi_processor_set_throttling(struct acpi_processor *pr, int state) * cpus. */ for_each_cpu_mask(i, online_throttling_cpus) { - match_pr = processors[i]; + match_pr = per_cpu(processors, i); /* * If the pointer is invalid, we will report the * error message and continue. diff --git a/include/acpi/processor.h b/include/acpi/processor.h index 06ebb6ef72..3795590e15 100644 --- a/include/acpi/processor.h +++ b/include/acpi/processor.h @@ -255,7 +255,7 @@ extern void acpi_processor_unregister_performance(struct int acpi_processor_notify_smm(struct module *calling_module); /* for communication between multiple parts of the processor kernel module */ -extern struct acpi_processor *processors[NR_CPUS]; +DECLARE_PER_CPU(struct acpi_processor *, processors); extern struct acpi_processor_errata errata; void arch_acpi_processor_init_pdc(struct acpi_processor *pr);