From: Lee Jones Date: Wed, 15 Jul 2020 08:26:29 +0000 (+0100) Subject: cpufreq: acpi-cpufreq: Mark 'dummy' variable as __always_unused X-Git-Tag: v5.9-rc1~175^2~1^2~2^2~8 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=e1711f296a2de54a6dd5bde4d92bb903dfaed1fb;p=thirdparty%2Flinux.git cpufreq: acpi-cpufreq: Mark 'dummy' variable as __always_unused If we fail to use a variable, even a 'dummy' one, then the compiler complains that it is set but not used. We know this is fine, so we set it as __always_unused to let the compiler know. Fixes the following W=1 kernel build warning(s): drivers/cpufreq/acpi-cpufreq.c: In function ‘cpu_freq_read_intel’: drivers/cpufreq/acpi-cpufreq.c:247:11: warning: variable ‘dummy’ set but not used [-Wunused-but-set-variable] drivers/cpufreq/acpi-cpufreq.c: In function ‘cpu_freq_read_amd’: drivers/cpufreq/acpi-cpufreq.c:265:11: warning: variable ‘dummy’ set but not used [-Wunused-but-set-variable] Signed-off-by: Lee Jones Acked-by: Viresh Kumar Signed-off-by: Rafael J. Wysocki --- diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c index 29e8ff422b91b..20422f07580fb 100644 --- a/drivers/cpufreq/acpi-cpufreq.c +++ b/drivers/cpufreq/acpi-cpufreq.c @@ -244,7 +244,7 @@ static unsigned extract_freq(struct cpufreq_policy *policy, u32 val) static u32 cpu_freq_read_intel(struct acpi_pct_register *not_used) { - u32 val, dummy; + u32 val, dummy __always_unused; rdmsr(MSR_IA32_PERF_CTL, val, dummy); return val; @@ -261,7 +261,7 @@ static void cpu_freq_write_intel(struct acpi_pct_register *not_used, u32 val) static u32 cpu_freq_read_amd(struct acpi_pct_register *not_used) { - u32 val, dummy; + u32 val, dummy __always_unused; rdmsr(MSR_AMD_PERF_CTL, val, dummy); return val;