From: tip-bot for Qian Cai <tipbot@zytor.com>
To: linux-tip-commits@vger.kernel.org
Cc: mingo@kernel.org, linux-kernel@vger.kernel.org, hpa@zytor.com,
tglx@linutronix.de, peterz@infradead.org,
torvalds@linux-foundation.org, cai@lca.pw
Subject: [tip:sched/core] sched/fair: Fix "runnable_avg_yN_inv" not used warnings
Date: Mon, 17 Jun 2019 07:21:29 -0700 [thread overview]
Message-ID: <tip-509466b7d480bc5d22e90b9fbe6122ae0e2fbe39@git.kernel.org> (raw)
In-Reply-To: <1559596304-31581-1-git-send-email-cai@lca.pw>
Commit-ID: 509466b7d480bc5d22e90b9fbe6122ae0e2fbe39
Gitweb: https://git.kernel.org/tip/509466b7d480bc5d22e90b9fbe6122ae0e2fbe39
Author: Qian Cai <cai@lca.pw>
AuthorDate: Mon, 3 Jun 2019 17:11:44 -0400
Committer: Ingo Molnar <mingo@kernel.org>
CommitDate: Mon, 17 Jun 2019 12:15:58 +0200
sched/fair: Fix "runnable_avg_yN_inv" not used warnings
runnable_avg_yN_inv[] is only used in kernel/sched/pelt.c but was
included in several other places because they need other macros all
came from kernel/sched/sched-pelt.h which was generated by
Documentation/scheduler/sched-pelt. As the result, it causes compilation
a lot of warnings,
kernel/sched/sched-pelt.h:4:18: warning: 'runnable_avg_yN_inv' defined but not used [-Wunused-const-variable=]
kernel/sched/sched-pelt.h:4:18: warning: 'runnable_avg_yN_inv' defined but not used [-Wunused-const-variable=]
kernel/sched/sched-pelt.h:4:18: warning: 'runnable_avg_yN_inv' defined but not used [-Wunused-const-variable=]
...
Silence 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 <cai@lca.pw>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/1559596304-31581-1-git-send-email-cai@lca.pw
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
Documentation/scheduler/sched-pelt.c | 3 ++-
kernel/sched/sched-pelt.h | 2 +-
2 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/Documentation/scheduler/sched-pelt.c b/Documentation/scheduler/sched-pelt.c
index e4219139386a..7238b355919c 100644
--- a/Documentation/scheduler/sched-pelt.c
+++ b/Documentation/scheduler/sched-pelt.c
@@ -20,7 +20,8 @@ void calc_runnable_avg_yN_inv(void)
int i;
unsigned int x;
- printf("static const u32 runnable_avg_yN_inv[] = {");
+ /* To silence -Wunused-but-set-variable warnings. */
+ 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,
prev parent reply other threads:[~2019-06-17 14:21 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-03 21:11 [PATCH v2] sched: fix "runnable_avg_yN_inv" not used warnings Qian Cai
2019-06-17 14:21 ` tip-bot for Qian Cai [this message]
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