From: Lee Jones Date: Wed, 15 Jul 2020 08:26:31 +0000 (+0100) Subject: cpufreq: powernow-k8: Mark 'hi' and 'lo' dummy variables as __always_unused X-Git-Tag: v5.9-rc1~175^2~1^2~2^2~6 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=638b509795a18c88ce391fb94d9191f1abcfe88d;p=thirdparty%2Flinux.git cpufreq: powernow-k8: Mark 'hi' and 'lo' dummy variables as __always_unused if we fail to use a variable, even a dummy ones, then the compiler complains that it is set but not used. We know this is fine, so we set them as __always_unused here to let the compiler know. 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; | ^~ Signed-off-by: Lee Jones Acked-by: Viresh Kumar Signed-off-by: Rafael J. Wysocki --- diff --git a/drivers/cpufreq/powernow-k8.c b/drivers/cpufreq/powernow-k8.c index 3984959eed1d5..0acc9e241cd7d 100644 --- a/drivers/cpufreq/powernow-k8.c +++ b/drivers/cpufreq/powernow-k8.c @@ -86,7 +86,7 @@ static u32 convert_fid_to_vco_fid(u32 fid) */ static int pending_bit_stuck(void) { - u32 lo, hi; + u32 lo, hi __always_unused; rdmsr(MSR_FIDVID_STATUS, lo, hi); return lo & MSR_S_LO_CHANGE_PENDING ? 1 : 0; @@ -282,7 +282,7 @@ static int core_voltage_pre_transition(struct powernow_k8_data *data, { u32 rvosteps = data->rvo; u32 savefid = data->currfid; - u32 maxvid, lo, rvomult = 1; + u32 maxvid, lo __always_unused, rvomult = 1; pr_debug("ph1 (cpu%d): start, currfid 0x%x, currvid 0x%x, reqvid 0x%x, rvo 0x%x\n", smp_processor_id(),