parisc: 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: James E.J. Bottomley <jejb@parisc-linux.org>
Link: http://lkml.kernel.org/r/20120420124557.988947805@linutronix.de

diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index 242a1b7ac759448ba6ab06be9f28d4c9e9bfb69a..ddb8b24b823d1c77881f80cc019570c537ea6c62 100644 (file)
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -17,6 +17,7 @@ config PARISC
        select GENERIC_PCI_IOMAP
        select IRQ_PER_CPU
        select ARCH_HAVE_NMI_SAFE_CMPXCHG
+       select GENERIC_SMP_IDLE_THREAD
 
        help
          The PA-RISC microprocessor is designed by Hewlett-Packard and used

diff --git a/arch/parisc/kernel/smp.c b/arch/parisc/kernel/smp.c
index eae8cd808f072852f2615bac76129b190998ef8f..f64f381b4d82ae12066d0c04dfd4f8c50dff52c8 100644 (file)
--- a/arch/parisc/kernel/smp.c
+++ b/arch/parisc/kernel/smp.c
@@ -334,26 +334,11 @@ void __init smp_callin(void)
 /*
  * Bring one cpu online.
  */
-int __cpuinit smp_boot_one_cpu(int cpuid)
+int __cpuinit smp_boot_one_cpu(int cpuid, struct task_struct *idle)
 {
        const struct cpuinfo_parisc *p = &per_cpu(cpu_data, cpuid);
-       struct task_struct *idle;
        long timeout;
 
-       /* 
-        * Create an idle task for this CPU.  Note the address wed* give 
-        * to kernel_thread is irrelevant -- it's going to start
-        * where OS_BOOT_RENDEVZ vector in SAL says to start.  But
-        * this gets all the other task-y sort of data structures set
-        * up like we wish.   We need to pull the just created idle task 
-        * off the run queue and stuff it into the init_tasks[] array.  
-        * Sheesh . . .
-        */
-
-       idle = fork_idle(cpuid);
-       if (IS_ERR(idle))
-               panic("SMP: fork failed for CPU:%d", cpuid);
-
        task_thread_info(idle)->cpu = cpuid;
 
        /* Let _start know what logical CPU we're booting
@@ -397,10 +382,6 @@ int __cpuinit smp_boot_one_cpu(int cpuid)
                udelay(100);
                barrier();
        }
-
-       put_task_struct(idle);
-       idle = NULL;
-
        printk(KERN_CRIT "SMP: CPU:%d is stuck.\n", cpuid);
        return -1;
 
@@ -452,7 +433,7 @@ void smp_cpus_done(unsigned int cpu_max)
 int __cpuinit __cpu_up(unsigned int cpu, struct task_struct *tidle)
 {
        if (cpu != 0 && cpu < parisc_max_cpus)
-               smp_boot_one_cpu(cpu);
+               smp_boot_one_cpu(cpu, tidle);
 
        return cpu_online(cpu) ? 0 : -ENOSYS;
 }