Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / x86 / include / asm / irq_regs.h

diff --git a/kernel/arch/x86/include/asm/irq_regs.h b/kernel/arch/x86/include/asm/irq_regs.h
new file mode 100644 (file)
index 0000000..d82250b
--- /dev/null
+++ b/kernel/arch/x86/include/asm/irq_regs.h
@@ -0,0 +1,31 @@
+/*
+ * Per-cpu current frame pointer - the location of the last exception frame on
+ * the stack, stored in the per-cpu area.
+ *
+ * Jeremy Fitzhardinge <jeremy@goop.org>
+ */
+#ifndef _ASM_X86_IRQ_REGS_H
+#define _ASM_X86_IRQ_REGS_H
+
+#include <asm/percpu.h>
+
+#define ARCH_HAS_OWN_IRQ_REGS
+
+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 = get_irq_regs();
+       this_cpu_write(irq_regs, new_regs);
+
+       return old_regs;
+}
+
+#endif /* _ASM_X86_IRQ_REGS_32_H */