smp.c:

  Remove task-migration IPI.   It's been replaced
  by Ingo's migration threads.

arch/ia64/kernel/smp.c

@@ -75,12 +75,8 @@ struct call_data_struct {
 
 static volatile struct call_data_struct *call_data;
 
-static spinlock_t migration_lock = SPIN_LOCK_UNLOCKED;
-static task_t *migrating_task;
-
 #define IPI_CALL_FUNC		0
 #define IPI_CPU_STOP		1
-#define IPI_MIGRATE_TASK	2
 
 static void
 stop_this_cpu (void)
@@ -143,14 +139,6 @@ handle_IPI (int irq, void *dev_id, struct pt_regs *regs)
 			      }
 			      break;
 
-			      case IPI_MIGRATE_TASK:
-			      {
-				      task_t *p = migrating_task;
-				      spin_unlock(&migration_lock);
-				      sched_task_migrated(p);
-			      }
-			      break;
-
 			      case IPI_CPU_STOP:
 				stop_this_cpu();
 				break;
@@ -350,15 +338,6 @@ smp_send_stop (void)
 	smp_num_cpus = 1;
 }
 
-void
-smp_migrate_task (int cpu, task_t *p)
-{
-	/* The target CPU will unlock the migration spinlock: */
-	spin_lock(&migration_lock);
-	migrating_task = p;
-	send_IPI_single(cpu, IPI_MIGRATE_TASK);
-}
-
 int __init
 setup_profiling_timer (unsigned int multiplier)
 {