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 to its own value here.
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 <[email protected]> Cc: Paul Diefenbaugh <[email protected]> Cc: Dominik Brodowski <[email protected]> Cc: Denis Sadykov <[email protected]> Signed-off-by: Lee Jones <[email protected]> --- drivers/cpufreq/acpi-cpufreq.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c index 429e5a36c08a9..d38a693b48e03 100644 --- a/drivers/cpufreq/acpi-cpufreq.c +++ b/drivers/cpufreq/acpi-cpufreq.c @@ -247,6 +247,7 @@ static u32 cpu_freq_read_intel(struct acpi_pct_register *not_used) u32 val, dummy; rdmsr(MSR_IA32_PERF_CTL, val, dummy); + dummy &= dummy; /* Silence set but not used warning */ return val; } @@ -264,6 +265,7 @@ static u32 cpu_freq_read_amd(struct acpi_pct_register *not_used) u32 val, dummy; rdmsr(MSR_AMD_PERF_CTL, val, dummy); + dummy &= dummy; /* Silence set but not used warning */ return val; } -- 2.25.1
