linux-kernel - Re: [PATCH] cpufreq: ACPI: Remove unused variables 'acpi_cpufreq

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <Y3U7MWezkc8aizuo@dev-arch.thelio-3990X>
Date:   Wed, 16 Nov 2022 12:34:09 -0700
From:   Nathan Chancellor <nathan@...nel.org>
To:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Viresh Kumar <viresh.kumar@...aro.org>
Cc:     Stuart Hayes <stuart.w.hayes@...il.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Tom Rix <trix@...hat.com>, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, llvm@...ts.linux.dev
Subject: Re: [PATCH] cpufreq: ACPI: Remove unused variables
 'acpi_cpufreq_online' and 'ret'

Hi all,

Small ping, was there an issue with this change? It seems pretty
straight forward to me and it is wreaking havoc on our build matrix due
to -Werror.

Cheers,
Nathan

On Tue, Nov 08, 2022 at 10:01:03AM -0700, Nathan Chancellor wrote:
> Clang warns:
> 
>   drivers/cpufreq/acpi-cpufreq.c:970:24: error: variable 'ret' is uninitialized when used here [-Werror,-Wuninitialized]
>           acpi_cpufreq_online = ret;
>                                 ^~~
>   drivers/cpufreq/acpi-cpufreq.c:960:9: note: initialize the variable 'ret' to silence this warning
>           int ret;
>                 ^
>                   = 0
>   1 error generated.
> 
> Both ret and acpi_cpufreq_online are now unused so they can be safely
> removed, clearing up the warning.
> 
> Fixes: 13fdbc8b8da6 ("cpufreq: ACPI: Defer setting boost MSRs")
> Link: https://github.com/ClangBuiltLinux/linux/issues/1757
> Signed-off-by: Nathan Chancellor <nathan@...nel.org>
> ---
>  drivers/cpufreq/acpi-cpufreq.c | 6 ------
>  1 file changed, 6 deletions(-)
> 
> diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c
> index c8fdfcf659e6..74ef0e05ff7b 100644
> --- a/drivers/cpufreq/acpi-cpufreq.c
> +++ b/drivers/cpufreq/acpi-cpufreq.c
> @@ -953,12 +953,8 @@ static struct cpufreq_driver acpi_cpufreq_driver = {
>  	.attr		= acpi_cpufreq_attr,
>  };
>  
> -static enum cpuhp_state acpi_cpufreq_online;
> -
>  static void __init acpi_cpufreq_boost_init(void)
>  {
> -	int ret;
> -
>  	if (!(boot_cpu_has(X86_FEATURE_CPB) || boot_cpu_has(X86_FEATURE_IDA))) {
>  		pr_debug("Boost capabilities not present in the processor\n");
>  		return;
> @@ -966,8 +962,6 @@ static void __init acpi_cpufreq_boost_init(void)
>  
>  	acpi_cpufreq_driver.set_boost = set_boost;
>  	acpi_cpufreq_driver.boost_enabled = boost_state(0);
> -
> -	acpi_cpufreq_online = ret;
>  }
>  
>  static int __init acpi_cpufreq_init(void)
> 
> base-commit: 21cdb6c18f85fe538ca8740bc79f11fbe08d0197
> -- 
> 2.38.1
>