From 70463daca852db396ce17f179d2404b257ba0f66 Mon Sep 17 00:00:00 2001
From: Jeremy Fitzhardinge <jeremy@goop.org>
Date: Thu, 7 Dec 2006 02:14:03 +0100
Subject: [PATCH] [PATCH] i386: Store the interrupt regs pointer in the PDA
Signed-off-by: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Andi Kleen <ak@suse.de>
---
include/asm-i386/irq_regs.h | 28 +++++++++++++++++++++++++++-
include/asm-i386/pda.h | 1 +
2 files changed, 28 insertions(+), 1 deletion(-)
diff --git a/include/asm-i386/irq_regs.h b/include/asm-i386/irq_regs.h
index 3dd9c0b7027..a1b3f7f594a 100644
--- a/include/asm-i386/irq_regs.h
+++ b/include/asm-i386/irq_regs.h
@@ -1 +1,27 @@
-#include <asm-generic/irq_regs.h>
+/*
+ * Per-cpu current frame pointer - the location of the last exception frame on
+ * the stack, stored in the PDA.
+ *
+ * Jeremy Fitzhardinge <jeremy@goop.org>
+ */
+#ifndef _ASM_I386_IRQ_REGS_H
+#define _ASM_I386_IRQ_REGS_H
+
+#include <asm/pda.h>
+
+static inline struct pt_regs *get_irq_regs(void)
+{
+ return read_pda(irq_regs);
+}
+
+static inline struct pt_regs *set_irq_regs(struct pt_regs *new_regs)
+{
+ struct pt_regs *old_regs;
+
+ old_regs = read_pda(irq_regs);
+ write_pda(irq_regs, new_regs);
+
+ return old_regs;
+}
+
+#endif /* _ASM_I386_IRQ_REGS_H */
diff --git a/include/asm-i386/pda.h b/include/asm-i386/pda.h
index 08a35c478af..2ba2736aa10 100644
--- a/include/asm-i386/pda.h
+++ b/include/asm-i386/pda.h
@@ -15,6 +15,7 @@ struct i386_pda
int cpu_number;
struct task_struct *pcurrent; /* current process */
+ struct pt_regs *irq_regs;
};
extern struct i386_pda *_cpu_pda[];
--
2.41.3