From 7a6c79f2fe53dac9b7b290f3a4c56b0958e19201 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Sun, 27 Dec 2015 00:27:38 +0100 Subject: [PATCH] cpufreq: Simplify core code related to boost support Notice that the boost_supported field in struct cpufreq_driver is redundant, because the driver's ->set_boost callback may be left unset if "boost" is not supported. Moreover, the only driver populating the ->set_boost callback is acpi_cpufreq, so make it avoid populating that callback if "boost" is not supported, rework the core to check ->set_boost instead of boost_supported to verify "boost" support and drop boost_supported which isn't used any more. Signed-off-by: Rafael J. Wysocki Acked-by: Viresh Kumar --- drivers/cpufreq/acpi-cpufreq.c | 5 ++--- drivers/cpufreq/cpufreq.c | 22 +++++++--------------- include/linux/cpufreq.h | 1 - 3 files changed, 9 insertions(+), 19 deletions(-) diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c index 12da54a28a42..51eef87bbc37 100644 --- a/drivers/cpufreq/acpi-cpufreq.c +++ b/drivers/cpufreq/acpi-cpufreq.c @@ -164,7 +164,7 @@ static ssize_t store_cpb(struct cpufreq_policy *policy, const char *buf, int ret; unsigned int val = 0; - if (!acpi_cpufreq_driver.boost_supported) + if (!acpi_cpufreq_driver.set_boost) return -EINVAL; ret = kstrtouint(buf, 10, &val); @@ -900,7 +900,6 @@ static struct cpufreq_driver acpi_cpufreq_driver = { .resume = acpi_cpufreq_resume, .name = "acpi-cpufreq", .attr = acpi_cpufreq_attr, - .set_boost = set_boost, }; static void __init acpi_cpufreq_boost_init(void) @@ -911,7 +910,7 @@ static void __init acpi_cpufreq_boost_init(void) if (!msrs) return; - acpi_cpufreq_driver.boost_supported = true; + acpi_cpufreq_driver.set_boost = set_boost; acpi_cpufreq_driver.boost_enabled = boost_state(0); cpu_notifier_register_begin(); diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 49f3f58f2501..c35e7da1ed7a 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -2332,23 +2332,13 @@ int cpufreq_boost_trigger_state(int state) static bool cpufreq_boost_supported(void) { - return likely(cpufreq_driver) && cpufreq_driver->boost_supported; + return likely(cpufreq_driver) && cpufreq_driver->set_boost; } static int create_boost_sysfs_file(void) { int ret; - if (!cpufreq_boost_supported()) - return 0; - - /* - * Check if driver provides function to enable boost - - * if not, use cpufreq_boost_set_sw as default - */ - if (!cpufreq_driver->set_boost) - cpufreq_driver->set_boost = cpufreq_boost_set_sw; - ret = sysfs_create_file(cpufreq_global_kobject, &boost.attr); if (ret) pr_err("%s: cannot register global BOOST sysfs file\n", @@ -2371,7 +2361,7 @@ int cpufreq_enable_boost_support(void) if (cpufreq_boost_supported()) return 0; - cpufreq_driver->boost_supported = true; + cpufreq_driver->set_boost = cpufreq_boost_set_sw; /* This will get removed on driver unregister */ return create_boost_sysfs_file(); @@ -2431,9 +2421,11 @@ int cpufreq_register_driver(struct cpufreq_driver *driver_data) if (driver_data->setpolicy) driver_data->flags |= CPUFREQ_CONST_LOOPS; - ret = create_boost_sysfs_file(); - if (ret) - goto err_null_driver; + if (cpufreq_boost_supported()) { + ret = create_boost_sysfs_file(); + if (ret) + goto err_null_driver; + } ret = subsys_interface_register(&cpufreq_interface); if (ret) diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h index f859b728d98e..88a4215125bc 100644 --- a/include/linux/cpufreq.h +++ b/include/linux/cpufreq.h @@ -278,7 +278,6 @@ struct cpufreq_driver { struct freq_attr **attr; /* platform specific boost support code */ - bool boost_supported; bool boost_enabled; int (*set_boost)(int state); };