alpha: 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: Matt Turner <mattst88@gmail.com>
Link: http://lkml.kernel.org/r/20120420124557.914631081@linutronix.de

diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig
index 56a4df9..991b8bb 100644 (file)
--- a/arch/alpha/Kconfig
+++ b/arch/alpha/Kconfig
@@ -15,6 +15,7 @@ config ALPHA
        select GENERIC_IRQ_SHOW
        select ARCH_WANT_OPTIONAL_GPIOLIB
        select ARCH_HAVE_NMI_SAFE_CMPXCHG
+       select GENERIC_SMP_IDLE_THREAD
        help
          The Alpha is a 64-bit general-purpose processor designed and
          marketed by the Digital Equipment Corporation of blessed memory,

diff --git a/arch/alpha/kernel/smp.c b/arch/alpha/kernel/smp.c
index 68d3947..35ddc02 100644 (file)
--- a/arch/alpha/kernel/smp.c
+++ b/arch/alpha/kernel/smp.c
@@ -357,24 +357,10 @@ secondary_cpu_start(int cpuid, struct task_struct *idle)
  * Bring one cpu online.
  */
 static int __cpuinit
-smp_boot_one_cpu(int cpuid)
+smp_boot_one_cpu(int cpuid, struct task_struct *idle)
 {
-       struct task_struct *idle;
        unsigned long timeout;
 
-       /* Cook up an idler for this guy.  Note that the address we
-          give to kernel_thread is irrelevant -- it's going to start
-          where HWRPB.CPU_restart says to start.  But this gets all
-          the other task-y sort of data structures set up like we
-          wish.  We can't use kernel_thread since we must avoid
-          rescheduling the child.  */
-       idle = fork_idle(cpuid);
-       if (IS_ERR(idle))
-               panic("failed fork for CPU %d", cpuid);
-
-       DBGS(("smp_boot_one_cpu: CPU %d state 0x%lx flags 0x%lx\n",
-             cpuid, idle->state, idle->flags));
-
        /* Signal the secondary to wait a moment.  */
        smp_secondary_alive = -1;
 
@@ -489,7 +475,7 @@ smp_prepare_boot_cpu(void)
 int __cpuinit
 __cpu_up(unsigned int cpu, struct task_struct *tidle)
 {
-       smp_boot_one_cpu(cpu);
+       smp_boot_one_cpu(cpu, tidle);
 
        return cpu_online(cpu) ? 0 : -ENOSYS;
 }