Don't enable the interrupt when waiti isn't used

esp-hal-embassy/src/executor/thread.rs

@@ -55,14 +55,17 @@ pub struct Executor {
 impl Executor {
     /// Create a new Executor.
     #[cfg_attr(
-        multi_core,
+        all(multi_core, low_power_wait),
         doc = r#"
 
 This will use software-interrupt 3 which isn't available for anything else to wake the other core(s)."#
     )]
     pub fn new() -> Self {
         Self {
             inner: InnerExecutor::new(
+                // Priority 1 means the timer queue can be accessed at interrupt priority 1 - for
+                // the thread mode executor it needs to be one higher than the base run level, to
+                // allow alarm interrupts to be handled.
                 Priority::Priority1,
                 (THREAD_MODE_CONTEXT + Cpu::current() as usize) as *mut (),
             ),
@@ -91,6 +94,7 @@ This will use software-interrupt 3 which isn't available for anything else to wa
     ///
     /// This function never returns.
     pub fn run(&'static mut self, init: impl FnOnce(Spawner)) -> ! {
+        #[cfg(all(multi_core, low_power_wait))]
         unwrap!(esp_hal::interrupt::enable(
             esp_hal::peripherals::Interrupt::FROM_CPU_INTR3,
             Priority::min(),