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Wed, 15 Jul 2020 01:26:50 -0700 (PDT) From: Lee Jones To: rjw@rjwysocki.net, viresh.kumar@linaro.org 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 Message-Id: <20200715082634.3024816-11-lee.jones@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200715082634.3024816-1-lee.jones@linaro.org> References: <20200715082634.3024816-1-lee.jones@linaro.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200715_042653_276587_0EB52515 X-CRM114-Status: GOOD ( 13.80 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2a00:1450:4864:20:0:0:0:444 listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-pm@vger.kernel.org, Paul Devriendt , Andreas Herrmann , linux-kernel@vger.kernel.org, Mark Langsdorf , Pavel Machek , Lee Jones , linux-arm-kernel@lists.infradead.org, Dominik Brodowski Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org 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 Cc: Dominik Brodowski Cc: Pavel Machek Cc: Paul Devriendt Cc: Mark Langsdorf Signed-off-by: Lee Jones Acked-by: Pavel Machek --- 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(),