Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull smp hotplug cleanups from Thomas Gleixner:
 "This series is merily a cleanup of code copied around in arch/* and
  not changing any of the real cpu hotplug horrors yet.  I wish I'd had
  something more substantial for 3.5, but I underestimated the lurking
  horror..."

Fix up trivial conflicts in arch/{arm,sparc,x86}/Kconfig and
arch/sparc/include/asm/thread_info_32.h

* 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (79 commits)
  um: Remove leftover declaration of alloc_task_struct_node()
  task_allocator: Use config switches instead of magic defines
  sparc: Use common threadinfo allocator
  score: Use common threadinfo allocator
  sh-use-common-threadinfo-allocator
  mn10300: Use common threadinfo allocator
  powerpc: Use common threadinfo allocator
  mips: Use common threadinfo allocator
  hexagon: Use common threadinfo allocator
  m32r: Use common threadinfo allocator
  frv: Use common threadinfo allocator
  cris: Use common threadinfo allocator
  x86: Use common threadinfo allocator
  c6x: Use common threadinfo allocator
  fork: Provide kmemcache based thread_info allocator
  tile: Use common threadinfo allocator
  fork: Provide weak arch_release_[task_struct|thread_info] functions
  fork: Move thread info gfp flags to header
  fork: Remove the weak insanity
  sh: Remove cpu_idle_wait()
  ...

1 files changed, 4 insertions, 15 deletions

diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index 0503c0c493a9..3700945ed0d5 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -265,18 +265,8 @@ static void __init xen_smp_prepare_cpus(unsigned int max_cpus)
                 set_cpu_possible(cpu, false);
         }
 
-        for_each_possible_cpu (cpu) {
-                struct task_struct *idle;
-
-                if (cpu == 0)
-                        continue;
-
-                idle = fork_idle(cpu);
-                if (IS_ERR(idle))
-                        panic("failed fork for CPU %d", cpu);
-
+        for_each_possible_cpu(cpu)
                 set_cpu_present(cpu, true);
-        }
 }
 
 static int __cpuinit
@@ -346,9 +336,8 @@ cpu_initialize_context(unsigned int cpu, struct task_struct *idle)
         return 0;
 }
 
-static int __cpuinit xen_cpu_up(unsigned int cpu)
+static int __cpuinit xen_cpu_up(unsigned int cpu, struct task_struct *idle)
 {
-        struct task_struct *idle = idle_task(cpu);
         int rc;
 
         per_cpu(current_task, cpu) = idle;
@@ -562,10 +551,10 @@ static void __init xen_hvm_smp_prepare_cpus(unsigned int max_cpus)
         xen_init_lock_cpu(0);
 }
 
-static int __cpuinit xen_hvm_cpu_up(unsigned int cpu)
+static int __cpuinit xen_hvm_cpu_up(unsigned int cpu, struct task_struct *tidle)
 {
         int rc;
-        rc = native_cpu_up(cpu);
+        rc = native_cpu_up(cpu, tidle);
         WARN_ON (xen_smp_intr_init(cpu));
         return rc;
 }