[PATCH v2 12/12] Revert "ARM: 9144/1: forbid ftrace with clang and thumb2_kernel"

[Nick Desaulniers]

On Mon, Jan 31, 2022 at 9:04 AM Ard Biesheuvel <ardb at kernel.org> wrote:
>
> This reverts commit ecb108e3e3f7c692082b7c6fce41779c3835854a.
>
> Clang + Thumb2 with ftrace is now supported.
>
> Signed-off-by: Ard Biesheuvel <ardb at kernel.org>

Thanks for all of the work that went into getting this fixed properly!
Reviewed-by: Nick Desaulniers <ndesaulniers at google.com>

> ---
>  arch/arm/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
> index 3c6216f194f2..4ad7080bc17c 100644
> --- a/arch/arm/Kconfig
> +++ b/arch/arm/Kconfig
> @@ -93,7 +93,7 @@ config ARM
>         select HAVE_FAST_GUP if ARM_LPAE
>         select HAVE_FTRACE_MCOUNT_RECORD if !XIP_KERNEL
>         select HAVE_FUNCTION_GRAPH_TRACER
> -       select HAVE_FUNCTION_TRACER if !XIP_KERNEL && !(THUMB2_KERNEL && CC_IS_CLANG)
> +       select HAVE_FUNCTION_TRACER if !XIP_KERNEL
>         select HAVE_FUTEX_CMPXCHG if FUTEX
>         select HAVE_GCC_PLUGINS
>         select HAVE_HW_BREAKPOINT if PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7)
> --
> 2.30.2
>


-- 
Thanks,
~Nick Desaulniers