struct acpi_thermal_trips trips;
struct acpi_handle_list devices;
struct timer_list timer;
+ struct mutex lock;
};
static const struct file_operations acpi_thermal_state_fops = {
return;
}
+ /* Check if someone else is already running */
+ if (!mutex_trylock(&tz->lock))
+ return;
+
state = tz->state;
result = acpi_thermal_get_temperature(tz);
if (result)
- return;
+ goto unlock;
memset(&tz->state, 0, sizeof(tz->state));
add_timer(&(tz->timer));
}
}
-
- return;
+ unlock:
+ mutex_unlock(&tz->lock);
}
/* --------------------------------------------------------------------------
strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME);
strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS);
acpi_driver_data(device) = tz;
-
+ mutex_init(&tz->lock);
result = acpi_thermal_get_info(tz);
if (result)
goto end;
}
acpi_thermal_remove_fs(device);
-
+ mutex_destroy(&tz->lock);
kfree(tz);
return 0;
}
}
#ifdef CONFIG_DMI
-static int thermal_act(struct dmi_system_id *d) {
+static int thermal_act(const struct dmi_system_id *d) {
if (act == 0) {
printk(KERN_NOTICE "ACPI: %s detected: "
}
return 0;
}
-static int thermal_nocrt(struct dmi_system_id *d) {
+static int thermal_nocrt(const struct dmi_system_id *d) {
printk(KERN_NOTICE "ACPI: %s detected: "
"disabling all critical thermal trip point actions.\n", d->ident);
nocrt = 1;
return 0;
}
-static int thermal_tzp(struct dmi_system_id *d) {
+static int thermal_tzp(const struct dmi_system_id *d) {
if (tzp == 0) {
printk(KERN_NOTICE "ACPI: %s detected: "
}
return 0;
}
-static int thermal_psv(struct dmi_system_id *d) {
+static int thermal_psv(const struct dmi_system_id *d) {
if (psv == 0) {
printk(KERN_NOTICE "ACPI: %s detected: "