kernel/idle: Clean up and refactoring / remove TICKLESS_IDLE_THRESH
While I'm in the idle code, let's clean this loop up. It was a really
bad #ifdef hell:
* Remove the CONFIG_TICKLESS_IDLE_THRESH logic (and the kconfig),
which never did anything but needlessly increase latency.
* Move the needed timeout logic from the main loop into
pm_save_idle(), which eliminates the special case for
!SYS_CLOCK_EXISTS.
Behavior (modulo that one kconfig) should be completely unchanged, and
now the inner part of the idle loop looks like:
while (true) {
(void) arch_irq_lock();
if (IS_ENABLED(CONFIG_PM)) {
pm_save_idle();
} else {
k_cpu_idle();
}
}
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
2 files changed
