Re: [PATCH] cpufreq: ACPI: Remove unused variables 'acpi_cpufreq_online' and 'ret'

From: Rafael J. Wysocki
Date: Wed Nov 16 2022 - 14:50:58 EST


On Wed, Nov 16, 2022 at 8:34 PM Nathan Chancellor <nathan@xxxxxxxxxx> wrote:
>
> 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.

Applied now, thanks!

> 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@xxxxxxxxxx>
> > ---
> > 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
> >