linux-kernel - [tip:smp/urgent] cpu/hotplug: Remove unused but set variable in _cpu

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Date:   Wed, 18 Jan 2017 02:57:58 -0800
From:   tip-bot for Tobias Klauser <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     bigeasy@...utronix.de, hpa@...or.com, mingo@...nel.org,
        tglx@...utronix.de, peterz@...radead.org, tklauser@...tanz.ch,
        linux-kernel@...r.kernel.org
Subject: [tip:smp/urgent] cpu/hotplug: Remove unused but set variable in
 _cpu_down()

Commit-ID:  0fec9557fd0c5349e3bd1a2141612a60bc20bb71
Gitweb:     http://git.kernel.org/tip/0fec9557fd0c5349e3bd1a2141612a60bc20bb71
Author:     Tobias Klauser <tklauser@...tanz.ch>
AuthorDate: Tue, 17 Jan 2017 15:35:01 +0100
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Wed, 18 Jan 2017 11:55:09 +0100

cpu/hotplug: Remove unused but set variable in _cpu_down()

After the recent removal of the hotplug notifiers the variable 'hasdied' in
_cpu_down() is set but no longer read, leading to the following GCC warning
when building with 'make W=1':

  kernel/cpu.c:767:7: warning: variable ‘hasdied’ set but not used [-Wunused-but-set-variable]

Fix it by removing the variable.

Fixes: 530e9b76ae8f ("cpu/hotplug: Remove obsolete cpu hotplug register/unregister functions")
Signed-off-by: Tobias Klauser <tklauser@...tanz.ch>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc: rt@...utronix.de
Link: http://lkml.kernel.org/r/20170117143501.20893-1-tklauser@distanz.ch
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>

---
 kernel/cpu.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/kernel/cpu.c b/kernel/cpu.c
index c475063..0a5f630 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -764,7 +764,6 @@ static int __ref _cpu_down(unsigned int cpu, int tasks_frozen,
 {
 	struct cpuhp_cpu_state *st = per_cpu_ptr(&cpuhp_state, cpu);
 	int prev_state, ret = 0;
-	bool hasdied = false;
 
 	if (num_online_cpus() == 1)
 		return -EBUSY;
@@ -809,7 +808,6 @@ static int __ref _cpu_down(unsigned int cpu, int tasks_frozen,
 		cpuhp_kick_ap_work(cpu);
 	}
 
-	hasdied = prev_state != st->state && st->state == CPUHP_OFFLINE;
 out:
 	cpu_hotplug_done();
 	return ret;