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[71.184.117.43]) by smtp.gmail.com with ESMTPSA id j29sm11895298qki.39.2019.05.22.19.13.09 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 22 May 2019 19:13:10 -0700 (PDT) From: Qian Cai To: mingo@redhat.com, peterz@infradead.org Cc: linux-kernel@vger.kernel.org, Qian Cai Subject: [PATCH] sched: fix "runnable_avg_yN_inv" not used warnings Date: Wed, 22 May 2019 22:12:45 -0400 Message-Id: <20190523021245.2882-1-cai@lca.pw> X-Mailer: git-send-email 2.20.1 (Apple Git-117) MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org runnable_avg_yN_inv[] is only used in kernel/sched/pelt.c but was included in several other places and causes compilation warnings, In file included from kernel/sched/pelt.h:2, from kernel/sched/rt.c:8: kernel/sched/sched-pelt.h:4:18: warning: 'runnable_avg_yN_inv' defined but not used [-Wunused-const-variable=] In file included from kernel/sched/pelt.h:2, from kernel/sched/fair.c:705: kernel/sched/sched-pelt.h:4:18: warning: 'runnable_avg_yN_inv' defined but not used [-Wunused-const-variable=] In file included from kernel/sched/pelt.h:2, from kernel/sched/deadline.c:19: kernel/sched/sched-pelt.h:4:18: warning: 'runnable_avg_yN_inv' defined but not used [-Wunused-const-variable=] Fixed it by appending the __maybe_unused attribute for it, so all generated variables and macros can still be kept in the same file. Signed-off-by: Qian Cai --- Documentation/scheduler/sched-pelt.c | 2 +- kernel/sched/sched-pelt.h | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/Documentation/scheduler/sched-pelt.c b/Documentation/scheduler/sched-pelt.c index e4219139386a..6c10b8764533 100644 --- a/Documentation/scheduler/sched-pelt.c +++ b/Documentation/scheduler/sched-pelt.c @@ -20,7 +20,7 @@ void calc_runnable_avg_yN_inv(void) int i; unsigned int x; - printf("static const u32 runnable_avg_yN_inv[] = {"); + printf("static const u32 runnable_avg_yN_inv[] __maybe_unused = {"); for (i = 0; i < HALFLIFE; i++) { x = ((1UL<<32)-1)*pow(y, i); diff --git a/kernel/sched/sched-pelt.h b/kernel/sched/sched-pelt.h index a26473674fb7..c529706bed11 100644 --- a/kernel/sched/sched-pelt.h +++ b/kernel/sched/sched-pelt.h @@ -1,7 +1,7 @@ /* SPDX-License-Identifier: GPL-2.0 */ /* Generated by Documentation/scheduler/sched-pelt; do not modify. */ -static const u32 runnable_avg_yN_inv[] = { +static const u32 runnable_avg_yN_inv[] __maybe_unused = { 0xffffffff, 0xfa83b2da, 0xf5257d14, 0xefe4b99a, 0xeac0c6e6, 0xe5b906e6, 0xe0ccdeeb, 0xdbfbb796, 0xd744fcc9, 0xd2a81d91, 0xce248c14, 0xc9b9bd85, 0xc5672a10, 0xc12c4cc9, 0xbd08a39e, 0xb8fbaf46, 0xb504f333, 0xb123f581, -- 2.20.1 (Apple Git-117)