[PATCH bpf-next 1/2] arm64/ftrace,bpf: Fix partial regs after bpf_prog_run

[Steven Rostedt]

On Wed, 7 Jan 2026 16:52:52 +0000
Will Deacon <will at kernel.org> wrote:

> diff --git a/include/linux/ftrace_regs.h b/include/linux/ftrace_regs.h
> index 15627ceea9bc..3ebd8cdac7c6 100644
> --- a/include/linux/ftrace_regs.h
> +++ b/include/linux/ftrace_regs.h
> @@ -33,6 +33,15 @@ struct ftrace_regs;
>  #define ftrace_regs_get_frame_pointer(fregs) \
>         frame_pointer(&arch_ftrace_regs(fregs)->regs)
>  
> +#else
> +
> +static __always_inline void
> +ftrace_partial_regs_update(const struct ftrace_regs *fregs, struct pt_regs *regs)
> +{
> +       ftrace_regs_set_instruction_pointer(fregs, instruction_pointer(regs));
> +       ftrace_regs_set_return_value(fregs, regs_return_value(regs));
> +}
> +
>  #endif /* HAVE_ARCH_FTRACE_REGS */
>  
>  /* This can be overridden by the architectures */

Hmm, maybe that would work. Of course you forgot to add the helper for the
!HAVE_ARCH_FTRACE_REGS case ;-)

-- Steve