# Re: \[PATCH v12 07/14\] unwind\_user/deferred: Make unwind deferral requests NMI-safe

- From: Steven Rostedt \<rostedt@goodmis.org\>
- Date: 2025-07-02 19:11:22 
- List: linux-trace-kernel
- Page: https://ratatoskr.run/linux-trace-kernel/2025/07/3118243
- Thread: https://ratatoskr.run/linux-trace-kernel/2025/07/3114813/t.md

```text
On Wed, 2 Jul 2025 17:53:05 +0200
Jens Remus [ref] wrote:

> > @@ -2,6 +2,9 @@
> >  #ifndef _LINUX_UNWIND_USER_DEFERRED_TYPES_H
> >  #define _LINUX_UNWIND_USER_DEFERRED_TYPES_H
> >  
> > +#include <asm/local64.h>
> > +#include <asm/local.h>  
> 
> This creates the following circular dependency, that breaks the build on
> s390 as follows, whenever local64.h is included first, so that local64_t
> is not yet defined when unwind_deferred_types.h gets included down the
> line:

As per the discussion on patch 6, this may not be an issue in the next
version. I'm looking to get rid of 64 bit cmpxchg.

-- Steve
```