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author | Lee Jones <lee.jones@linaro.org> | 2020-07-15 09:26:29 +0100 |
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committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2020-07-15 15:17:06 +0200 |
commit | e1711f296a2de54a6dd5bde4d92bb903dfaed1fb (patch) | |
tree | 8968408112896ffbdc25a66f13c22973714615e3 /drivers/cpufreq/acpi-cpufreq.c | |
parent | 44bd9a30ef737d6bdfcf7c4e31896a09a4b15955 (diff) | |
download | linux-e1711f296a2de54a6dd5bde4d92bb903dfaed1fb.tar.gz |
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 <lee.jones@linaro.org> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq/acpi-cpufreq.c')
-rw-r--r-- | drivers/cpufreq/acpi-cpufreq.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c index 29e8ff422b91..20422f07580f 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; |