linux-kernel - Re: [PATCH] firmware: qcom: avoid struct initialization warning on gcc-4.8

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Date:   Wed, 29 Apr 2020 12:37:11 -0700
From:   Stephen Boyd <swboyd@...omium.org>
To:     Andy Gross <agross@...nel.org>, Arnd Bergmann <arnd@...db.de>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Elliot Berman <eberman@...eaurora.org>
Cc:     Arnd Bergmann <arnd@...db.de>, Rob Clark <robdclark@...il.com>,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] firmware: qcom: avoid struct initialization warning on gcc-4.8

Quoting Arnd Bergmann (2020-04-29 01:57:33)
> When building with old compilers like gcc-4.8, a struct initializer
> can warn about invalid syntax:
> 
> drivers/firmware/qcom_scm-smc.c: In function 'scm_smc_call':
> drivers/firmware/qcom_scm-smc.c:94:9: error: missing braces around initializer [-Werror=missing-braces]
>   struct arm_smccc_args smc = {0};
>          ^
> drivers/firmware/qcom_scm-smc.c:94:9: error: (near initialization for 'smc.args') [-Werror=missing-braces]
> cc1: some warnings being treated as errors
> drivers/firmware/qcom_scm-legacy.c: In function 'scm_legacy_call':
> drivers/firmware/qcom_scm-legacy.c:139:9: error: missing braces around initializer [-Werror=missing-braces]
>   struct arm_smccc_args smc = {0};
>          ^
> drivers/firmware/qcom_scm-legacy.c:139:9: error: (near initialization for 'smc.args') [-Werror=missing-braces]
> 
> Change this to use the empty initializer extension that
> works with all compilers.
> 
> Fixes: 590e92809a58 ("firmware: qcom_scm-32: Move SMCCC register filling to qcom_scm_call")
> Fixes: 3f951ea627da ("firmware: qcom_scm-64: Move SMC register filling to qcom_scm_call_smccc")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---

Reviewed-by: Stephen Boyd <swboyd@...omium.org>