Re: [PATCH v2] unwind: Add sframe_(un)register() system calls

[Heiko Carstens]

On Thu, May 28, 2026 at 03:10:23PM -0400, Steven Rostedt wrote:
> From: Steven Rostedt <rostedt@xxxxxxxxxxx>
> 
> Add system calls to register and unregister sframes that can be used by
> dynamic linkers to tell the kernel where the sframe section is in memory
> for libraries it loads.

...

> diff --git a/arch/s390/kernel/syscalls/syscall.tbl b/arch/s390/kernel/syscalls/syscall.tbl
> index 09a7ef04d979..52519e2acdc8 100644
> --- a/arch/s390/kernel/syscalls/syscall.tbl
> +++ b/arch/s390/kernel/syscalls/syscall.tbl
> @@ -398,3 +398,6 @@
>  469	common	file_setattr			sys_file_setattr
>  470	common	listns				sys_listns
>  471	common	rseq_slice_yield		sys_rseq_slice_yield
> +472	common	stacktrace_setup		sys_stacktrace_setup
> +472	common	sframe_register			sys_sframe_register
> +473	common	sframe_unregister		sys_sframe_unregister

What is stacktrace_setup? And why only for s390? Looks like a leftover.