Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / asm-generic / irq_regs.h

diff --git a/kernel/include/asm-generic/irq_regs.h b/kernel/include/asm-generic/irq_regs.h
new file mode 100644 (file)
index 0000000..6bf9355
--- /dev/null
+++ b/kernel/include/asm-generic/irq_regs.h
@@ -0,0 +1,37 @@
+/* Fallback per-CPU frame pointer holder
+ *
+ * Copyright (C) 2006 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 License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#ifndef _ASM_GENERIC_IRQ_REGS_H
+#define _ASM_GENERIC_IRQ_REGS_H
+
+#include <linux/percpu.h>
+
+/*
+ * Per-cpu current frame pointer - the location of the last exception frame on
+ * the stack
+ */
+DECLARE_PER_CPU(struct pt_regs *, __irq_regs);
+
+static inline struct pt_regs *get_irq_regs(void)
+{
+       return __this_cpu_read(__irq_regs);
+}
+
+static inline struct pt_regs *set_irq_regs(struct pt_regs *new_regs)
+{
+       struct pt_regs *old_regs;
+
+       old_regs = __this_cpu_read(__irq_regs);
+       __this_cpu_write(__irq_regs, new_regs);
+       return old_regs;
+}
+
+#endif /* _ASM_GENERIC_IRQ_REGS_H */