X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=include%2Fasm-ia64%2Fsystem.h;h=2f3620593687818aac2ef154351995e8a42a9fae;hb=0409d3a332fc4347efba535a5003943f2a4aa1ca;hp=80c5a234e2599c90006de76e27b47f49b6197ade;hpb=37ef4399a6bb265d3035e6d6e45f7677b132a3ba;p=powerpc.git

diff --git a/include/asm-ia64/system.h b/include/asm-ia64/system.h
index 80c5a234e2..2f36205936 100644
--- a/include/asm-ia64/system.h
+++ b/include/asm-ia64/system.h
@@ -244,37 +244,19 @@ extern void ia64_load_extra (struct task_struct *task);
 		__ia64_save_fpu((prev)->thread.fph);				\
 	}									\
 	__switch_to(prev, next, last);						\
+	/* "next" in old context is "current" in new context */			\
+	if (unlikely((current->thread.flags & IA64_THREAD_MIGRATION) &&	       \
+		     (task_cpu(current) !=				       \
+		      		      task_thread_info(current)->last_cpu))) { \
+		platform_migrate(current);				       \
+		task_thread_info(current)->last_cpu = task_cpu(current);       \
+	}								       \
 } while (0)
 #else
 # define switch_to(prev,next,last)	__switch_to(prev, next, last)
 #endif
 
-/*
- * On IA-64, we don't want to hold the runqueue's lock during the low-level context-switch,
- * because that could cause a deadlock.  Here is an example by Erich Focht:
- *
- * Example:
- * CPU#0:
- * schedule()
- *    -> spin_lock_irq(&rq->lock)
- *    -> context_switch()
- *       -> wrap_mmu_context()
- *          -> read_lock(&tasklist_lock)
- *
- * CPU#1:
- * sys_wait4() or release_task() or forget_original_parent()
- *    -> write_lock(&tasklist_lock)
- *    -> do_notify_parent()
- *       -> wake_up_parent()
- *          -> try_to_wake_up()
- *             -> spin_lock_irq(&parent_rq->lock)
- *
- * If the parent's rq happens to be on CPU#0, we'll wait for the rq->lock
- * of that CPU which will not be released, because there we wait for the
- * tasklist_lock to become available.
- */
 #define __ARCH_WANT_UNLOCKED_CTXSW
-
 #define ARCH_HAS_PREFETCH_SWITCH_STACK
 #define ia64_platform_is(x) (strcmp(x, platform_name) == 0)
 
@@ -283,6 +265,8 @@ void sched_cacheflush(void);
 
 #define arch_align_stack(x) (x)
 
+void default_idle(void);
+
 #endif /* __KERNEL__ */
 
 #endif /* __ASSEMBLY__ */