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authorLee Jones <lee.jones@linaro.org>2020-07-15 11:26:31 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2020-07-15 16:17:06 +0300
commit638b509795a18c88ce391fb94d9191f1abcfe88d (patch)
treef95e1a3a99f66addf3fab06a076833e49160c432 /drivers/cpufreq
parenta7b909376d3994ffb983a4037dd12689159fd4fb (diff)
downloadlinux-638b509795a18c88ce391fb94d9191f1abcfe88d.tar.xz
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 <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')
-rw-r--r--drivers/cpufreq/powernow-k8.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/cpufreq/powernow-k8.c b/drivers/cpufreq/powernow-k8.c
index 3984959eed1d..0acc9e241cd7 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(),