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cpuidle: teo: Combine candidate state index checks against 0

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There are two candidate state index checks against 0 in teo_select()
that need not be separate, so combine them and update comments around
them.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Christian Loehle <christian.loehle@arm.com>
Tested-by: Aboorva Devarajan <aboorvad@linux.ibm.com>
Tested-by: Christian Loehle <christian.loehle@arm.com>
Link: https://patch.msgid.link/13676346.uLZWGnKmhe@rjwysocki.net
This commit is contained in:
Rafael J. Wysocki
2025-01-13 19:39:00 +01:00
parent 92ce5c07b7
commit ea185406d1
1 changed files with 9 additions and 14 deletions
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23
drivers/cpuidle/governors/teo.c
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@@ -436,23 +436,18 @@ static int teo_select(struct cpuidle_driver *drv, struct cpuidle_device *dev,
if (idx > constraint_idx)
idx = constraint_idx;
if (!idx && prev_intercept_idx) {
/*
* We have to query the sleep length here otherwise we don't
* know after wakeup if our guess was correct.
*/
duration_ns = tick_nohz_get_sleep_length(&delta_tick);
cpu_data->sleep_length_ns = duration_ns;
if (!idx) {
if (prev_intercept_idx) {
/*
* Query the sleep length to be able to count the wakeup
* as a hit if it is caused by a timer.
*/
duration_ns = tick_nohz_get_sleep_length(&delta_tick);
cpu_data->sleep_length_ns = duration_ns;
}
goto out_tick;
}
/*
* Skip the timers check if state 0 is the current candidate one,
* because an immediate non-timer wakeup is expected in that case.
*/
if (!idx)
goto out_tick;
/*
* If state 0 is a polling one, check if the target residency of
* the current candidate state is low enough and skip the timers