linux-kernel - Re: [PATCH v2] clk: qcom: gpucc-sm8350: Fix "initializer element is not constant" error

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Message-ID: <CAA8EJppiUhkbE2c=ce7AVkgMPZ0Sz-uuws220WYk4GaXZbrQzA@mail.gmail.com>
Date:   Mon, 11 Jul 2022 20:42:18 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Nathan Chancellor <nathan@...nel.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Tom Rix <trix@...hat.com>,
        Robert Foss <robert.foss@...aro.org>,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org, llvm@...ts.linux.dev,
        kernel test robot <lkp@...el.com>
Subject: Re: [PATCH v2] clk: qcom: gpucc-sm8350: Fix "initializer element is
 not constant" error

On Mon, 11 Jul 2022 at 20:41, Nathan Chancellor <nathan@...nel.org> wrote:
>
> When building with clang or GCC older than 8, errors along the following
> lines occur:
>
>   drivers/clk/qcom/gpucc-sm8350.c:111:2: error: initializer element is not a compile-time constant
>           gpu_cc_parent,
>           ^~~~~~~~~~~~~
>   drivers/clk/qcom/gpucc-sm8350.c:126:2: error: initializer element is not a compile-time constant
>           gpu_cc_parent,
>           ^~~~~~~~~~~~~
>   2 errors generated.
>
> The C standard allows an implementation to accept other forms of
> constant expressions, which GCC 8+ has chosen to do, but it is not
> required. Just inline the initializer to resolve the error.
>
> Fixes: 160758b05ab1 ("clk: qcom: add support for SM8350 GPUCC")
> Link: https://github.com/ClangBuiltLinux/linux/issues/1660
> Reported-by: kernel test robot <lkp@...el.com>
> Signed-off-by: Nathan Chancellor <nathan@...nel.org>

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>

> ---
>
> v1 -> v2: https://lore.kernel.org/20220711163021.152578-1-nathan@kernel.org/
>
> * Just inline the initializer, rather than using a macro (Dmitry).
>
>  drivers/clk/qcom/gpucc-sm8350.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/clk/qcom/gpucc-sm8350.c b/drivers/clk/qcom/gpucc-sm8350.c
> index d13fa813d190..5367ce654ac9 100644
> --- a/drivers/clk/qcom/gpucc-sm8350.c
> +++ b/drivers/clk/qcom/gpucc-sm8350.c
> @@ -108,7 +108,7 @@ static const struct parent_map gpu_cc_parent_map_0[] = {
>  };
>
>  static const struct clk_parent_data gpu_cc_parent_data_0[] = {
> -       gpu_cc_parent,
> +       { .fw_name = "bi_tcxo" },
>         { .hw = &gpu_cc_pll0.clkr.hw },
>         { .hw = &gpu_cc_pll1.clkr.hw },
>         { .fw_name = "gcc_gpu_gpll0_clk_src" },
> @@ -123,7 +123,7 @@ static const struct parent_map gpu_cc_parent_map_1[] = {
>  };
>
>  static const struct clk_parent_data gpu_cc_parent_data_1[] = {
> -       gpu_cc_parent,
> +       { .fw_name = "bi_tcxo" },
>         { .hw = &gpu_cc_pll1.clkr.hw },
>         { .fw_name = "gcc_gpu_gpll0_clk_src" },
>         { .fw_name = "gcc_gpu_gpll0_div_clk_src" },
>
> base-commit: 0dd8e16bfbc003b009f843e75fae4046daa08fe9
> --
> 2.37.0
>


-- 
With best wishes
Dmitry