Messages in this thread Patch in this message | | | From | Lee Jones <> | Subject | [PATCH v2 08/13] cpufreq: acpi-cpufreq: Mark 'dummy' variable as __always_unused | Date | Wed, 15 Jul 2020 09:26:29 +0100 |
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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]
Cc: Andy Grover <andrew.grover@intel.com> Cc: Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> Cc: Dominik Brodowski <linux@brodo.de> Cc: Denis Sadykov <denis.m.sadykov@intel.com> Signed-off-by: Lee Jones <lee.jones@linaro.org> --- drivers/cpufreq/acpi-cpufreq.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c index 429e5a36c08a9..6b3d8355c8dea 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; -- 2.25.1
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