čt 10. 10. 2024 v 22:06 odesílatel Steven Rostedt [off-list ref] napsal:

If nr_states is zero, this returns 0 without ever allocating
saved_cpu_idle_disable_state.

quoted

...

This returns -1 even if nr_states is zero. That is,
save_cpu_idle_disable_state() can return success, but this restore will
return failure.

-- Steve

Oh I see: there might be no idle states to save,
saved_cpu_idle_disable_state doesn't get allocated at all, and then
restore_cpu_idle_disable_state behaves as the saves weren't saved
before. Checking for nr_state should fix that; I'll send a v3.

Tomas