[PATCH v4] ARM, ARM64, LONGARCH, XTENSA: Delay HW BP notification to task_work()

[Sebastian Andrzej Siewior]

On 2026-10-12 18:15:51 [+0800], Huacai Chen wrote:
> Hi, Sebastian,
Hi Huacai,

> > diff --git a/include/linux/hw_breakpoint.h b/include/linux/hw_breakpoint.h
> > index db199d653dd1a..91e8d80220c54 100644
> > --- a/include/linux/hw_breakpoint.h
> > +++ b/include/linux/hw_breakpoint.h
> > @@ -85,6 +85,9 @@ extern int register_perf_hw_breakpoint(struct perf_event *bp);
> >  extern void unregister_hw_breakpoint(struct perf_event *bp);
> >  extern void unregister_wide_hw_breakpoint(struct perf_event * __percpu *cpu_events);
> >  extern bool hw_breakpoint_is_used(void);
> > +extern void perf_arch_hwbp_send_sig(struct perf_event *bp);
> > +extern void perf_hwbp_notify(struct perf_event *bp, struct perf_sample_data *data,
> > +                            struct pt_regs *regs);
> Maybe this declaration can be put in one line because there is no 80
> characters limit now.

We don't save much, do we? It looks more readable. Maybe if the perf
maintainer requests it. Looks like waste to repost it just for that.

Any comments on the looong bits?

> Huacai

Sebastian