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Subject[PATCH 6/6] 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>
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>

---
include/asm-i386/current.h | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff -r 3752f3a5974a include/asm-i386/current.h
--- a/include/asm-i386/current.h Mon Sep 25 01:48:09 2006 -0700
+++ b/include/asm-i386/current.h Mon Sep 25 01:48:09 2006 -0700
@@ -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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