[PATCH v1] arm64/efi: Don't fail check current_in_efi() if preemptible

[Yeoreum Yun]

LGTM. feel free to add:
Reviewed-by: Yeoreum Yun <yeoreum.yun at arm.com>

> As EFI runtime services can now be run without disabling preemption remove
> the check for non preemptible in current_in_efi(). Without this change,
> firmware errors that were previously recovered from by
> __efi_runtime_kernel_fixup_exception() will lead to a kernel oops.
>
> Fixes: a5baf582f4c0 ("arm64/efi: Call EFI runtime services without disabling preemption")
> Signed-off-by: Ben Horgan <ben.horgan at arm.com>
> ---
> On the partner platform I was testing on this issue caused the boot to fail.
> ---
>  arch/arm64/include/asm/efi.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/arm64/include/asm/efi.h b/arch/arm64/include/asm/efi.h
> index aa91165ca140..e8a9783235cb 100644
> --- a/arch/arm64/include/asm/efi.h
> +++ b/arch/arm64/include/asm/efi.h
> @@ -45,7 +45,7 @@ void arch_efi_call_virt_teardown(void);
>   * switching to the EFI runtime stack.
>   */
>  #define current_in_efi()						\
> -	(!preemptible() && efi_rt_stack_top != NULL &&			\
> +	(efi_rt_stack_top != NULL &&					\
>  	 on_task_stack(current, READ_ONCE(efi_rt_stack_top[-1]), 1))
>
>  #define ARCH_EFI_IRQ_FLAGS_MASK (PSR_D_BIT | PSR_A_BIT | PSR_I_BIT | PSR_F_BIT)
> --
> 2.43.0
>

--
Sincerely,
Yeoreum Yun