Re: [tip: x86/core] x86: Fix CPUIDLE_FLAG_IRQ_ENABLE leaking timer reprogram

[Frederic Weisbecker]

On Thu, Nov 30, 2023 at 12:15:19PM +0100, Peter Zijlstra wrote:
> This is so, because all mwait users should be in __cpuidle section,
> which itself is part of the noinstr section and as such
> kprobes/hw-breakpoints etc.. are disallowed.
> 
> Notable vmlinux.lds.h has:
> 
> #define NOINSTR_TEXT							\
> 		ALIGN_FUNCTION();					\
> 		__noinstr_text_start = .;				\
> 		*(.noinstr.text)					\
> 		__cpuidle_text_start = .;				\
> 		*(.cpuidle.text)					\
> 		__cpuidle_text_end = .;					\
> 		__noinstr_text_end = .;

So #DB aren't supposed to happen then, right? Or you noticed an mwait
user that doesn't have __cpuidle?

Thanks.