From ec7fcaabbfb3c5bd5189f857b6ac7bb9745ef291 Mon Sep 17 00:00:00 2001
From: Jeremy Fitzhardinge <jeremy@goop.org>
Date: Thu, 7 Dec 2006 02:14:03 +0100
Subject: [PATCH] i386: Implement "current" with the PDA

Use the pcurrent field in the PDA to implement the "current" macro.  This ends
up compiling down to a single instruction to get the current task.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Chuck Ebbert <76306.1226@compuserve.com>
Cc: Zachary Amsden <zach@vmware.com>
Cc: Jan Beulich <jbeulich@novell.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---
 include/asm-i386/current.h | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

(limited to 'include/asm-i386/current.h')

diff --git a/include/asm-i386/current.h b/include/asm-i386/current.h
index 3cbbecd79016..5252ee0f6d7a 100644
--- a/include/asm-i386/current.h
+++ b/include/asm-i386/current.h
@@ -1,13 +1,14 @@
 #ifndef _I386_CURRENT_H
 #define _I386_CURRENT_H
 
-#include <linux/thread_info.h>
+#include <asm/pda.h>
+#include <linux/compiler.h>
 
 struct task_struct;
 
-static __always_inline struct task_struct * get_current(void)
+static __always_inline struct task_struct *get_current(void)
 {
-	return current_thread_info()->task;
+	return read_pda(pcurrent);
 }
  
 #define current get_current()
-- 
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