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authorDavid Howells <dhowells@redhat.com>2012-03-28 18:30:03 +0100
committerDavid Howells <dhowells@redhat.com>2012-03-28 18:30:03 +0100
commit158bc507c2f53109bed51c806acf5bfd48d95f1a (patch)
tree8c5f98ca9ccfd4362fe50c46038988794e96795b /include/asm-generic/switch_to.h
parentb4816afa3986704d1404fc48e931da5135820472 (diff)
Split the switch_to() wrapper out of asm-generic/system.h
Split the switch_to() wrapper out of asm-generic/system.h into its own asm-generic/system.h as part of the asm/system.h disintegration. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'include/asm-generic/switch_to.h')
-rw-r--r--include/asm-generic/switch_to.h30
1 files changed, 30 insertions, 0 deletions
diff --git a/include/asm-generic/switch_to.h b/include/asm-generic/switch_to.h
new file mode 100644
index 000000000000..052c4ac04fd5
--- /dev/null
+++ b/include/asm-generic/switch_to.h
@@ -0,0 +1,30 @@
+/* Generic task switch macro wrapper, based on MN10300 definitions.
+ *
+ * It should be possible to use these on really simple architectures,
+ * but it serves more as a starting point for new ports.
+ *
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+#ifndef __ASM_GENERIC_SWITCH_TO_H
+#define __ASM_GENERIC_SWITCH_TO_H
+
+#include <linux/thread_info.h>
+
+/*
+ * Context switching is now performed out-of-line in switch_to.S
+ */
+extern struct task_struct *__switch_to(struct task_struct *,
+ struct task_struct *);
+
+#define switch_to(prev, next, last) \
+ do { \
+ ((last) = __switch_to((prev), (next))); \
+ } while (0)
+
+#endif /* __ASM_GENERIC_SWITCH_TO_H */