blackfin: Use generic idle thread allocation

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

2 files changed, 2 insertions, 18 deletions

diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig
index 373a6902d8fa..779b9c846fd7 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 d0cddd95b0dd..00bbe672b3b3 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);