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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
commitf9aa7e1882f3ceec919b30f64a2ce6e66a2571b1 (patch)
treed9b1e03d15102703722e39883ac719be52615e1a /arch/xtensa/include/asm/switch_to.h
parent8978bfd2288adaa24d39fa15f57eb9e24ffeca12 (diff)
Disintegrate asm/system.h for Xtensa
Disintegrate asm/system.h for Xtensa. Signed-off-by: David Howells <dhowells@redhat.com> cc: Chris Zankel <chris@zankel.net>
Diffstat (limited to 'arch/xtensa/include/asm/switch_to.h')
-rw-r--r--arch/xtensa/include/asm/switch_to.h22
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/xtensa/include/asm/switch_to.h b/arch/xtensa/include/asm/switch_to.h
new file mode 100644
index 00000000000..6b73bf0eb1f
--- /dev/null
+++ b/arch/xtensa/include/asm/switch_to.h
@@ -0,0 +1,22 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2005 Tensilica Inc.
+ */
+
+#ifndef _XTENSA_SWITCH_TO_H
+#define _XTENSA_SWITCH_TO_H
+
+/* * switch_to(n) should switch tasks to task nr n, first
+ * checking that n isn't the current task, in which case it does nothing.
+ */
+extern void *_switch_to(void *last, void *next);
+
+#define switch_to(prev,next,last) \
+do { \
+ (last) = _switch_to(prev, next); \
+} while(0)
+
+#endif /* _XTENSA_SWITCH_TO_H */