On Mon, Jul 14, 2025 at 10:19:19AM -0400, Steven Rostedt wrote:
> On Mon, 14 Jul 2025 15:29:36 +0200
> Peter Zijlstra <pet...@infradead.org> wrote:
>
> > +#ifdef CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG
> > +#define UNWIND_NMI_SAFE 1
> > +static inline bool try_assign_cnt(struct unwind_task_info *info, u32 cnt)
> > +{
> > + u32 zero = 0;
> > + return try_cmpxchg(&info->id.cnt, &zero, cnt);
> > +}
> > +static inline bool test_and_set_pending(struct unwind_task_info *info)
> > +{
> > + return info->pending || cmpxchg_local(&info->pending, 0, 1);
> > +}
> > +#el
>
> Patch 10 moves the pending bit into the unwind_mask as it needs to be
> in sync with the different tracer requests. I'm not sure how this
> change will interact with that.
Urgh; so I hate reviewing code you're ripping out in the next patch :-(
Let me go stare at that.
