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metag: Use common outgoing-CPU-notification code 

This commit removes the open-coded CPU-offline notification with new
common code.  This change avoids calling scheduler code using RCU from
an offline CPU that RCU is ignoring.  This commit is compatible with
the existing code in not checking for timeout during a prior offline
for a given CPU.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: <linux-metag@vger.kernel.org>
hifive-unleashed-5.1
Paul E. McKenney 2015-02-26 14:57:25 -08:00
parent a17b4b7487
commit 490ab882e2
1 changed files with 2 additions and 3 deletions
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5
arch/metag/kernel/smp.c
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@ -261,7 +261,6 @@ int __cpu_up(unsigned int cpu, struct task_struct *idle)
}
#ifdef CONFIG_HOTPLUG_CPU
static DECLARE_COMPLETION(cpu_killed);
/*
* __cpu_disable runs on the processor to be shutdown.
@ -299,7 +298,7 @@ int __cpu_disable(void)
*/
void __cpu_die(unsigned int cpu)
{
if (!wait_for_completion_timeout(&cpu_killed, msecs_to_jiffies(1)))
if (!cpu_wait_death(cpu, 1))
pr_err("CPU%u: unable to kill\n", cpu);
}
@ -314,7 +313,7 @@ void cpu_die(void)
local_irq_disable();
idle_task_exit();
complete(&cpu_killed);
(void)cpu_report_death();
asm ("XOR TXENABLE, D0Re0,D0Re0\n");
}