* This patch seems to have been misplaced. Replace arrays sized by NR_CPUS with percpu variables. Prior reference: http://marc.info/?l=linux-kernel&m=120251421825989&w=4 Subject: [PATCH 1/4] cpufreq: change cpu freq tables to per_cpu variables From: Mike Travis Date: 2008-02-08 23:37:39 Applies to both tip/master and linux-next. Signed-off-by: Mike Travis Cc: Jason Baron Cc: Dave Jones Cc: cpufreq@lists.linux.org.uk --- drivers/cpufreq/cpufreq_userspace.c | 79 +++++++++++++++++++----------------- 1 file changed, 43 insertions(+), 36 deletions(-) --- linux-2.6.tip.orig/drivers/cpufreq/cpufreq_userspace.c +++ linux-2.6.tip/drivers/cpufreq/cpufreq_userspace.c @@ -30,16 +30,18 @@ /** * A few values needed by the userspace governor */ -static unsigned int cpu_max_freq[NR_CPUS]; -static unsigned int cpu_min_freq[NR_CPUS]; -static unsigned int cpu_cur_freq[NR_CPUS]; /* current CPU freq */ -static unsigned int cpu_set_freq[NR_CPUS]; /* CPU freq desired by userspace */ -static unsigned int cpu_is_managed[NR_CPUS]; +static DEFINE_PER_CPU(unsigned int, cpu_max_freq); +static DEFINE_PER_CPU(unsigned int, cpu_min_freq); +static DEFINE_PER_CPU(unsigned int, cpu_cur_freq); /* current CPU freq */ +static DEFINE_PER_CPU(unsigned int, cpu_set_freq); /* CPU freq desired by + userspace */ +static DEFINE_PER_CPU(unsigned int, cpu_is_managed); static DEFINE_MUTEX (userspace_mutex); static int cpus_using_userspace_governor; -#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_GOVERNOR, "userspace", msg) +#define dprintk(msg...) \ + cpufreq_debug_printk(CPUFREQ_DEBUG_GOVERNOR, "userspace", msg) /* keep track of frequency transitions */ static int @@ -48,12 +50,12 @@ userspace_cpufreq_notifier(struct notifi { struct cpufreq_freqs *freq = data; - if (!cpu_is_managed[freq->cpu]) + if (!per_cpu(cpu_is_managed, freq->cpu)) return 0; dprintk("saving cpu_cur_freq of cpu %u to be %u kHz\n", freq->cpu, freq->new); - cpu_cur_freq[freq->cpu] = freq->new; + per_cpu(cpu_cur_freq, freq->cpu) = freq->new; return 0; } @@ -77,15 +79,15 @@ static int cpufreq_set(struct cpufreq_po dprintk("cpufreq_set for cpu %u, freq %u kHz\n", policy->cpu, freq); mutex_lock(&userspace_mutex); - if (!cpu_is_managed[policy->cpu]) + if (!per_cpu(cpu_is_managed, policy->cpu)) goto err; - cpu_set_freq[policy->cpu] = freq; + per_cpu(cpu_set_freq, policy->cpu) = freq; - if (freq < cpu_min_freq[policy->cpu]) - freq = cpu_min_freq[policy->cpu]; - if (freq > cpu_max_freq[policy->cpu]) - freq = cpu_max_freq[policy->cpu]; + if (freq < per_cpu(cpu_min_freq, policy->cpu)) + freq = per_cpu(cpu_min_freq, policy->cpu); + if (freq > per_cpu(cpu_max_freq, policy->cpu)) + freq = per_cpu(cpu_max_freq, policy->cpu); /* * We're safe from concurrent calls to ->target() here @@ -104,7 +106,7 @@ static int cpufreq_set(struct cpufreq_po static ssize_t show_speed(struct cpufreq_policy *policy, char *buf) { - return sprintf(buf, "%u\n", cpu_cur_freq[policy->cpu]); + return sprintf(buf, "%u\n", per_cpu(cpu_cur_freq, policy->cpu)); } static int cpufreq_governor_userspace(struct cpufreq_policy *policy, @@ -127,12 +129,17 @@ static int cpufreq_governor_userspace(st } cpus_using_userspace_governor++; - cpu_is_managed[cpu] = 1; - cpu_min_freq[cpu] = policy->min; - cpu_max_freq[cpu] = policy->max; - cpu_cur_freq[cpu] = policy->cur; - cpu_set_freq[cpu] = policy->cur; - dprintk("managing cpu %u started (%u - %u kHz, currently %u kHz)\n", cpu, cpu_min_freq[cpu], cpu_max_freq[cpu], cpu_cur_freq[cpu]); + per_cpu(cpu_is_managed, cpu) = 1; + per_cpu(cpu_min_freq, cpu) = policy->min; + per_cpu(cpu_max_freq, cpu) = policy->max; + per_cpu(cpu_cur_freq, cpu) = policy->cur; + per_cpu(cpu_set_freq, cpu) = policy->cur; + dprintk("managing cpu %u started " + "(%u - %u kHz, currently %u kHz)\n", + cpu, + per_cpu(cpu_min_freq, cpu), + per_cpu(cpu_max_freq, cpu), + per_cpu(cpu_cur_freq, cpu)); mutex_unlock(&userspace_mutex); break; @@ -145,34 +152,34 @@ static int cpufreq_governor_userspace(st CPUFREQ_TRANSITION_NOTIFIER); } - cpu_is_managed[cpu] = 0; - cpu_min_freq[cpu] = 0; - cpu_max_freq[cpu] = 0; - cpu_set_freq[cpu] = 0; + per_cpu(cpu_is_managed, cpu) = 0; + per_cpu(cpu_min_freq, cpu) = 0; + per_cpu(cpu_max_freq, cpu) = 0; + per_cpu(cpu_set_freq, cpu) = 0; dprintk("managing cpu %u stopped\n", cpu); mutex_unlock(&userspace_mutex); break; case CPUFREQ_GOV_LIMITS: mutex_lock(&userspace_mutex); - dprintk("limit event for cpu %u: %u - %u kHz," + dprintk("limit event for cpu %u: %u - %u kHz, " "currently %u kHz, last set to %u kHz\n", cpu, policy->min, policy->max, - cpu_cur_freq[cpu], cpu_set_freq[cpu]); - if (policy->max < cpu_set_freq[cpu]) { + per_cpu(cpu_cur_freq, cpu), + per_cpu(cpu_set_freq, cpu)); + if (policy->max < per_cpu(cpu_set_freq, cpu)) { __cpufreq_driver_target(policy, policy->max, CPUFREQ_RELATION_H); - } - else if (policy->min > cpu_set_freq[cpu]) { + } else if (policy->min > per_cpu(cpu_set_freq, cpu)) { __cpufreq_driver_target(policy, policy->min, CPUFREQ_RELATION_L); - } - else { - __cpufreq_driver_target(policy, cpu_set_freq[cpu], + } else { + __cpufreq_driver_target(policy, + per_cpu(cpu_set_freq, cpu), CPUFREQ_RELATION_L); } - cpu_min_freq[cpu] = policy->min; - cpu_max_freq[cpu] = policy->max; - cpu_cur_freq[cpu] = policy->cur; + per_cpu(cpu_min_freq, cpu) = policy->min; + per_cpu(cpu_max_freq, cpu) = policy->max; + per_cpu(cpu_cur_freq, cpu) = policy->cur; mutex_unlock(&userspace_mutex); break; } -- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/