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// SPDX-License-Identifier: MIT
/* Copyright © 2025 Intel Corporation */
#include <linux/jiffies.h>
#include "i915_timer_util.h"
void cancel_timer(struct timer_list *t)
{
if (!timer_active(t))
return;
timer_delete(t);
WRITE_ONCE(t->expires, 0);
}
void set_timer_ms(struct timer_list *t, unsigned long timeout)
{
if (!timeout) {
cancel_timer(t);
return;
}
timeout = msecs_to_jiffies(timeout);
/*
* Paranoia to make sure the compiler computes the timeout before
* loading 'jiffies' as jiffies is volatile and may be updated in
* the background by a timer tick. All to reduce the complexity
* of the addition and reduce the risk of losing a jiffy.
*/
barrier();
/* Keep t->expires = 0 reserved to indicate a canceled timer. */
mod_timer(t, jiffies + timeout ?: 1);
}
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