From 7650b281b091f39f5e97f13b45ab3813b1526b65 Mon Sep 17 00:00:00 2001 From: Venkatesh Pallipadi Date: Tue, 3 Oct 2006 12:36:30 -0700 Subject: [PATCH] [CPUFREQ][6/8] acpi-cpufreq: Eliminate get of current freq on notification Only change the frequency if the state previously set is different from what we are trying to set. We don't really have to get the current frequency at this point. Signed-off-by: Denis Sadykov Signed-off-by: Venkatesh Pallipadi Signed-off-by: Alexey Starikovskiy Signed-off-by: Dave Jones --- arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c index 385f17aca0..e6513e9940 100644 --- a/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c +++ b/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c @@ -324,11 +324,8 @@ static int acpi_cpufreq_target(struct cpufreq_policy *policy, online_policy_cpus = policy->cpus; #endif - cmd.val = get_cur_val(online_policy_cpus); - freqs.old = extract_freq(cmd.val, data); - freqs.new = data->freq_table[next_state].frequency; next_perf_state = data->freq_table[next_state].index; - if (freqs.new == freqs.old) { + if (perf->state == next_perf_state) { if (unlikely(data->resume)) { dprintk("Called after resume, resetting to P%d\n", next_perf_state); @@ -366,6 +363,8 @@ static int acpi_cpufreq_target(struct cpufreq_policy *policy, else cpu_set(policy->cpu, cmd.mask); + freqs.old = data->freq_table[perf->state].frequency; + freqs.new = data->freq_table[next_perf_state].frequency; for_each_cpu_mask(i, cmd.mask) { freqs.cpu = i; cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE); @@ -613,6 +612,7 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy) policy->cur = acpi_cpufreq_guess_freq(data, policy->cpu); break; case ACPI_ADR_SPACE_FIXED_HARDWARE: + acpi_cpufreq_driver.get = get_cur_freq_on_cpu; get_cur_freq_on_cpu(cpu); break; default: @@ -687,7 +687,6 @@ static struct freq_attr *acpi_cpufreq_attr[] = { static struct cpufreq_driver acpi_cpufreq_driver = { .verify = acpi_cpufreq_verify, .target = acpi_cpufreq_target, - .get = get_cur_freq_on_cpu, .init = acpi_cpufreq_cpu_init, .exit = acpi_cpufreq_cpu_exit, .resume = acpi_cpufreq_resume, -- 2.39.5