linux-kernel - [tip:sched/core] sched/core: Silence a warning in sched

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Date:   Thu, 25 Jul 2019 09:26:26 -0700
From:   tip-bot for Qian Cai <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     torvalds@...ux-foundation.org, hpa@...or.com,
        linux-kernel@...r.kernel.org, cai@....pw, tglx@...utronix.de,
        peterz@...radead.org, mingo@...nel.org
Subject: [tip:sched/core] sched/core: Silence a warning in sched_init()

Commit-ID:  a1dc0446d64966dc0ae756aebdc449f335742c13
Gitweb:     https://git.kernel.org/tip/a1dc0446d64966dc0ae756aebdc449f335742c13
Author:     Qian Cai <cai@....pw>
AuthorDate: Fri, 19 Jul 2019 21:23:19 -0400
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Thu, 25 Jul 2019 15:55:05 +0200

sched/core: Silence a warning in sched_init()

Compiling a kernel with both FAIR_GROUP_SCHED=n and RT_GROUP_SCHED=n
will generate a compiler warning:

  kernel/sched/core.c: In function 'sched_init':
  kernel/sched/core.c:5906:32: warning: variable 'ptr' set but not used

It is unnecessary to have both "alloc_size" and "ptr", so just combine
them.

Signed-off-by: Qian Cai <cai@....pw>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: valentin.schneider@....com
Link: https://lkml.kernel.org/r/20190720012319.884-1-cai@lca.pw
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 kernel/sched/core.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 042c736b2b73..46f3ca9e392a 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -6430,19 +6430,19 @@ DECLARE_PER_CPU(cpumask_var_t, select_idle_mask);
 
 void __init sched_init(void)
 {
-	unsigned long alloc_size = 0, ptr;
+	unsigned long ptr = 0;
 	int i;
 
 	wait_bit_init();
 
 #ifdef CONFIG_FAIR_GROUP_SCHED
-	alloc_size += 2 * nr_cpu_ids * sizeof(void **);
+	ptr += 2 * nr_cpu_ids * sizeof(void **);
 #endif
 #ifdef CONFIG_RT_GROUP_SCHED
-	alloc_size += 2 * nr_cpu_ids * sizeof(void **);
+	ptr += 2 * nr_cpu_ids * sizeof(void **);
 #endif
-	if (alloc_size) {
-		ptr = (unsigned long)kzalloc(alloc_size, GFP_NOWAIT);
+	if (ptr) {
+		ptr = (unsigned long)kzalloc(ptr, GFP_NOWAIT);
 
 #ifdef CONFIG_FAIR_GROUP_SCHED
 		root_task_group.se = (struct sched_entity **)ptr;