Messages in this thread Patch in this message | | | From | Lee Jones <> | Subject | [PATCH v2 10/13] cpufreq: powernow-k8: Mark 'hi' and 'lo' dummy variables as __always_unused | Date | Wed, 15 Jul 2020 09:26:31 +0100 |
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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; | ^~
Cc: Andreas Herrmann <herrmann.der.user@googlemail.com> Cc: Dominik Brodowski <linux@brodo.de> Cc: Pavel Machek <pavel@ucw.cz> Cc: Paul Devriendt <paul.devriendt@amd.com> Cc: Mark Langsdorf <mark.langsdorf@amd.com> Signed-off-by: Lee Jones <lee.jones@linaro.org> --- drivers/cpufreq/powernow-k8.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
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(), -- 2.25.1
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