linux-kernel - [tip:smp/hotplug] blackfin: Use generic idle thread allocation

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Date:	Sat, 28 Apr 2012 02:13:24 -0700
From:	tip-bot for Thomas Gleixner <tglx@...utronix.de>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
	rusty@...tcorp.com.au, peterz@...radead.org,
	srivatsa.bhat@...ux.vnet.ibm.com, paulmck@...ux.vnet.ibm.com,
	vapier@...too.org, tglx@...utronix.de
Subject: [tip:smp/hotplug] blackfin: Use generic idle thread allocation

Commit-ID:  6bba2682c62e432eaf7b82f8ca182e8c73256e74
Gitweb:     http://git.kernel.org/tip/6bba2682c62e432eaf7b82f8ca182e8c73256e74
Author:     Thomas Gleixner <tglx@...utronix.de>
AuthorDate: Fri, 20 Apr 2012 13:05:53 +0000
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Thu, 26 Apr 2012 12:06:12 +0200

blackfin: Use generic idle thread allocation

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Rusty Russell <rusty@...tcorp.com.au>
Cc: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
Cc: Srivatsa S. Bhat <srivatsa.bhat@...ux.vnet.ibm.com>
Cc: Mike Frysinger <vapier@...too.org>
Link: http://lkml.kernel.org/r/20120420124557.717064871@linutronix.de

---
 arch/blackfin/Kconfig           |    1 +
 arch/blackfin/mach-common/smp.c |   19 +------------------
 2 files changed, 2 insertions(+), 18 deletions(-)

diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig
index 373a690..779b9c8 100644
--- a/arch/blackfin/Kconfig
+++ b/arch/blackfin/Kconfig
@@ -37,6 +37,7 @@ config BLACKFIN
 	select GENERIC_IRQ_PROBE
 	select IRQ_PER_CPU if SMP
 	select HAVE_NMI_WATCHDOG if NMI_WATCHDOG
+	select GENERIC_SMP_IDLE_THREAD
 
 config GENERIC_CSUM
 	def_bool y
diff --git a/arch/blackfin/mach-common/smp.c b/arch/blackfin/mach-common/smp.c
index d0cddd9..00bbe67 100644
--- a/arch/blackfin/mach-common/smp.c
+++ b/arch/blackfin/mach-common/smp.c
@@ -340,27 +340,10 @@ void smp_send_stop(void)
 	return;
 }
 
-int __cpuinit __cpu_up(unsigned int cpu, struct task_struct *tidle)
+int __cpuinit __cpu_up(unsigned int cpu, struct task_struct *idle)
 {
 	int ret;
-	struct blackfin_cpudata *ci = &per_cpu(cpu_data, cpu);
-	struct task_struct *idle = ci->idle;
 
-	if (idle) {
-		free_task(idle);
-		idle = NULL;
-	}
-
-	if (!idle) {
-		idle = fork_idle(cpu);
-		if (IS_ERR(idle)) {
-			printk(KERN_ERR "CPU%u: fork() failed\n", cpu);
-			return PTR_ERR(idle);
-		}
-		ci->idle = idle;
-	} else {
-		init_idle(idle, cpu);
-	}
 	secondary_stack = task_stack_page(idle) + THREAD_SIZE;
 
 	ret = platform_boot_secondary(cpu, idle);
--
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