提交 17ffc8b0 编写于 作者: R Rafael J. Wysocki

Merge branches 'pm-cpuidle', 'pm-cpufreq' and 'acpi-resources'

* pm-cpuidle:
  suspend-to-idle: Prevent RCU from complaining about tick_freeze()

* pm-cpufreq:
  cpufreq: Allow freq_table to be obtained for offline CPUs
  cpufreq: Initialize the governor again while restoring policy

* acpi-resources:
  ACPI / PCI: Fix regressions caused by resource_size_t overflow with 32-bit kernel
......@@ -193,6 +193,7 @@ static bool acpi_decode_space(struct resource_win *win,
u8 iodec = attr->granularity == 0xfff ? ACPI_DECODE_10 : ACPI_DECODE_16;
bool wp = addr->info.mem.write_protect;
u64 len = attr->address_length;
u64 start, end, offset = 0;
struct resource *res = &win->res;
/*
......@@ -204,9 +205,6 @@ static bool acpi_decode_space(struct resource_win *win,
pr_debug("ACPI: Invalid address space min_addr_fix %d, max_addr_fix %d, len %llx\n",
addr->min_address_fixed, addr->max_address_fixed, len);
res->start = attr->minimum;
res->end = attr->maximum;
/*
* For bridges that translate addresses across the bridge,
* translation_offset is the offset that must be added to the
......@@ -214,12 +212,22 @@ static bool acpi_decode_space(struct resource_win *win,
* primary side. Non-bridge devices must list 0 for all Address
* Translation offset bits.
*/
if (addr->producer_consumer == ACPI_PRODUCER) {
res->start += attr->translation_offset;
res->end += attr->translation_offset;
} else if (attr->translation_offset) {
if (addr->producer_consumer == ACPI_PRODUCER)
offset = attr->translation_offset;
else if (attr->translation_offset)
pr_debug("ACPI: translation_offset(%lld) is invalid for non-bridge device.\n",
attr->translation_offset);
start = attr->minimum + offset;
end = attr->maximum + offset;
win->offset = offset;
res->start = start;
res->end = end;
if (sizeof(resource_size_t) < sizeof(u64) &&
(offset != win->offset || start != res->start || end != res->end)) {
pr_warn("acpi resource window ([%#llx-%#llx] ignored, not CPU addressable)\n",
attr->minimum, attr->maximum);
return false;
}
switch (addr->resource_type) {
......@@ -236,8 +244,6 @@ static bool acpi_decode_space(struct resource_win *win,
return false;
}
win->offset = attr->translation_offset;
if (addr->producer_consumer == ACPI_PRODUCER)
res->flags |= IORESOURCE_WINDOW;
......
......@@ -169,6 +169,15 @@ struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy)
}
EXPORT_SYMBOL_GPL(get_governor_parent_kobj);
struct cpufreq_frequency_table *cpufreq_frequency_get_table(unsigned int cpu)
{
struct cpufreq_policy *policy = per_cpu(cpufreq_cpu_data, cpu);
return policy && !policy_is_inactive(policy) ?
policy->freq_table : NULL;
}
EXPORT_SYMBOL_GPL(cpufreq_frequency_get_table);
static inline u64 get_cpu_idle_time_jiffy(unsigned int cpu, u64 *wall)
{
u64 idle_time;
......@@ -1132,6 +1141,7 @@ static struct cpufreq_policy *cpufreq_policy_restore(unsigned int cpu)
down_write(&policy->rwsem);
policy->cpu = cpu;
policy->governor = NULL;
up_write(&policy->rwsem);
}
......
......@@ -297,15 +297,6 @@ int cpufreq_table_validate_and_show(struct cpufreq_policy *policy,
}
EXPORT_SYMBOL_GPL(cpufreq_table_validate_and_show);
struct cpufreq_policy *cpufreq_cpu_get_raw(unsigned int cpu);
struct cpufreq_frequency_table *cpufreq_frequency_get_table(unsigned int cpu)
{
struct cpufreq_policy *policy = cpufreq_cpu_get_raw(cpu);
return policy ? policy->freq_table : NULL;
}
EXPORT_SYMBOL_GPL(cpufreq_frequency_get_table);
MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
MODULE_DESCRIPTION("CPUfreq frequency table helpers");
MODULE_LICENSE("GPL");
......@@ -112,7 +112,12 @@ int cpuidle_find_deepest_state(struct cpuidle_driver *drv,
static void enter_freeze_proper(struct cpuidle_driver *drv,
struct cpuidle_device *dev, int index)
{
tick_freeze();
/*
* trace_suspend_resume() called by tick_freeze() for the last CPU
* executing it contains RCU usage regarded as invalid in the idle
* context, so tell RCU about that.
*/
RCU_NONIDLE(tick_freeze());
/*
* The state used here cannot be a "coupled" one, because the "coupled"
* cpuidle mechanism enables interrupts and doing that with timekeeping
......@@ -122,7 +127,7 @@ static void enter_freeze_proper(struct cpuidle_driver *drv,
WARN_ON(!irqs_disabled());
/*
* timekeeping_resume() that will be called by tick_unfreeze() for the
* last CPU executing it calls functions containing RCU read-side
* first CPU executing it calls functions containing RCU read-side
* critical sections, so tell RCU about that.
*/
RCU_NONIDLE(tick_unfreeze());
......
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