[PATCH v17 06/15] arm64: syscall: Rework the syscall exit path in el0_svc_common()

[Linus Walleij]

On Tue, Jul 21, 2026 at 10:19 AM Jinjie Ruan <ruanjinjie at huawei.com> wrote:


> In preparation for moving arm64 over to the generic entry,
> invert the nested conditional flags check within el0_svc_common().
>
> No functional changes.
(...)
>         if (!has_syscall_work(flags) && !IS_ENABLED(CONFIG_DEBUG_RSEQ)) {
>                 flags = read_thread_flags();
> -               if (!has_syscall_work(flags) && !(flags & _TIF_SINGLESTEP))
> -                       return;
> +               if (has_syscall_work(flags) || flags & _TIF_SINGLESTEP)
> +                       syscall_trace_exit(regs);
> +               return;

What about just:

if (...)
  goto trace_exit;

This is easier to follow IMO.

With that:
Reviewed-by: Linus Walleij <linusw at kernel.org>

Yours,
Linus Walleij