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/powernow-k8.c: In function ‘pending_bit_stuck’: drivers/cpufreq/powernow-k8.c:89:10: warning: variable ‘hi’ set but not used [-Wunused-but-set-variable] 89 | u32 lo, hi; | ^~ drivers/cpufreq/powernow-k8.c: In function ‘core_voltage_pre_transition’: drivers/cpufreq/powernow-k8.c:285:14: warning: variable ‘lo’ set but not used [-Wunused-but-set-variable] 285 | u32 maxvid, lo, rvomult = 1; | ^~ Cc: Andreas Herrmann <[email protected]> Cc: Dominik Brodowski <[email protected]> Cc: Pavel Machek <[email protected]> Cc: Paul Devriendt <[email protected]> Cc: Mark Langsdorf <[email protected]> Signed-off-by: Lee Jones <[email protected]> --- drivers/cpufreq/powernow-k8.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/cpufreq/powernow-k8.c b/drivers/cpufreq/powernow-k8.c index 3984959eed1d5..b76df81044c4f 100644 --- a/drivers/cpufreq/powernow-k8.c +++ b/drivers/cpufreq/powernow-k8.c @@ -89,6 +89,7 @@ static int pending_bit_stuck(void) u32 lo, hi; rdmsr(MSR_FIDVID_STATUS, lo, hi); + hi &= hi; /* Silence set but not used warning */ return lo & MSR_S_LO_CHANGE_PENDING ? 1 : 0; } @@ -292,6 +293,7 @@ static int core_voltage_pre_transition(struct powernow_k8_data *data, rvomult = 2; rvosteps *= rvomult; rdmsr(MSR_FIDVID_STATUS, lo, maxvid); + lo &= lo; /* Silence set but not used warning */ maxvid = 0x1f & (maxvid >> 16); pr_debug("ph1 maxvid=0x%x\n", maxvid); if (reqvid < maxvid) /* lower numbers are higher voltages */ -- 2.25.1
