Re: [PATCH v10 02/11] x86: hw_breakpoint: Add a kconfig to clarify when a breakpoint fires

[Steven Rostedt]

On Thu, 23 Jul 2026 08:02:51 +0900
"Masami Hiramatsu (Google)" <mhiramat@xxxxxxxxxx> wrote:

> diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
> index b58c2565024f..d9b6fa5c35d9 100644
> --- a/kernel/trace/Kconfig
> +++ b/kernel/trace/Kconfig
> @@ -866,6 +866,7 @@ config WPROBE_EVENTS
>  	bool "Enable wprobe-based dynamic events"
>  	depends on TRACING
>  	depends on HAVE_HW_BREAKPOINT
> +	depends on HAVE_POST_BREAKPOINT_HOOK
>  	select PROBE_EVENTS
>  	select DYNAMIC_EVENTS
>  	help

Is this really needed as a hard dependency?

Is it just because you want to guarantee it happens after the breakpoint?
What's wrong if it happens just before it changes? We should probably have
a way to note it's before. But isn't it still useful to know *where* it was
changed?

-- Steve