Re: [PATCH v4 03/21] HWBP: Add modify_wide_hw_breakpoint_local() API

Randy Dunlap
2025-09-13T04:13:19Z

On 9/12/25 3:11 AM, Jinchao Wang wrote:
> +/**
> + * modify_wide_hw_breakpoint_local - update breakpoint config for local cpu
> + * @bp: the hwbp perf event for this cpu
> + * @attr: the new attribute for @bp
> + *
> + * This does not release and reserve the slot of HWBP, just reuse the current

of a HWBP; it just reuses

and preferable s/cpu/CPU/ in comments.

> + * slot on local CPU. So the users must update the other CPUs by themselves.
> + * Also, since this does not release/reserve the slot, this can not change the
> + * type to incompatible type of the HWBP.
> + * Return err if attr is invalid or the cpu fails to update debug register
> + * for new @attr.
> + */
> +#ifdef CONFIG_HAVE_REINSTALL_HW_BREAKPOINT
> +int modify_wide_hw_breakpoint_local(struct perf_event *bp,
> + struct perf_event_attr *attr)
> +{

--
~Randy