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platform/x86: intel_ips: Convert timers to use timer_setup() 

In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to using the new timer_setup() and from_timer()
to pass the timer pointer explicitly. Moves timer structure off stack and
into struct ips_driver.

Cc: Darren Hart <dvhart@infradead.org>
Cc: Andy Shevchenko <andy@infradead.org>
Cc: platform-driver-x86@vger.kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
This commit is contained in:
Kees Cook 2017-10-04 17:54:21 -07:00 committed by Andy Shevchenko
parent e4a18052bb
commit fbc15e3040
1 changed files with 7 additions and 8 deletions
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15
drivers/platform/x86/intel_ips.c
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@ -296,6 +296,7 @@ struct ips_driver {
struct task_struct *monitor;
struct task_struct *adjust;
struct dentry *debug_root;
struct timer_list timer;
/* Average CPU core temps (all averages in .01 degrees C for precision) */
u16 ctv1_avg_temp;
@ -937,9 +938,10 @@ static u32 calc_avg_power(struct ips_driver *ips, u32 *array)
return avg;
}
static void monitor_timeout(unsigned long arg)
static void monitor_timeout(struct timer_list *t)
{
wake_up_process((struct task_struct *)arg);
struct ips_driver *ips = from_timer(ips, t, timer);
wake_up_process(ips->monitor);
}
/**
@ -956,7 +958,6 @@ static void monitor_timeout(unsigned long arg)
static int ips_monitor(void *data)
{
struct ips_driver *ips = data;
struct timer_list timer;
unsigned long seqno_timestamp, expire, last_msecs, last_sample_period;
int i;
u32 *cpu_samples, *mchp_samples, old_cpu_power;
@ -1044,8 +1045,7 @@ static int ips_monitor(void *data)
schedule_timeout_interruptible(msecs_to_jiffies(IPS_SAMPLE_PERIOD));
last_sample_period = IPS_SAMPLE_PERIOD;
setup_deferrable_timer_on_stack(&timer, monitor_timeout,
(unsigned long)current);
timer_setup(&ips->timer, monitor_timeout, TIMER_DEFERRABLE);
do {
u32 cpu_val, mch_val;
u16 val;
@ -1103,7 +1103,7 @@ static int ips_monitor(void *data)
expire = jiffies + msecs_to_jiffies(IPS_SAMPLE_PERIOD);
__set_current_state(TASK_INTERRUPTIBLE);
mod_timer(&timer, expire);
mod_timer(&ips->timer, expire);
schedule();
/* Calculate actual sample period for power averaging */
@ -1112,8 +1112,7 @@ static int ips_monitor(void *data)
last_sample_period = 1;
} while (!kthread_should_stop());
del_timer_sync(&timer);
destroy_timer_on_stack(&timer);
del_timer_sync(&ips->timer);
dev_dbg(ips->dev, "ips-monitor thread stopped\n");