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-rw-r--r--arch/unicore32/include/asm/switch_to.h30
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/unicore32/include/asm/switch_to.h b/arch/unicore32/include/asm/switch_to.h
new file mode 100644
index 00000000000..39572d2bd69
--- /dev/null
+++ b/arch/unicore32/include/asm/switch_to.h
@@ -0,0 +1,30 @@
+/*
+ * Task switching for PKUnity SoC and UniCore ISA
+ *
+ * Copyright (C) 2001-2012 GUAN Xue-tao
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef __UNICORE_SWITCH_TO_H__
+#define __UNICORE_SWITCH_TO_H__
+
+struct task_struct;
+struct thread_info;
+
+/*
+ * switch_to(prev, next) should switch from task `prev' to `next'
+ * `prev' will never be the same as `next'. schedule() itself
+ * contains the memory barrier to tell GCC not to cache `current'.
+ */
+extern struct task_struct *__switch_to(struct task_struct *,
+ struct thread_info *, struct thread_info *);
+
+#define switch_to(prev, next, last) \
+ do { \
+ last = __switch_to(prev, task_thread_info(prev), \
+ task_thread_info(next)); \
+ } while (0)
+
+#endif /* __UNICORE_SWITCH_TO_H__ */