linux-kernel - [PATCH 8/21] [PATCH] unify current_text

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Date:	Mon, 17 Dec 2007 20:52:31 -0200
From:	Glauber de Oliveira Costa <gcosta@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	akpm@...ux-foundation.org, glommer@...il.com, tglx@...utronix.de,
	mingo@...e.hu, ehabkost@...hat.com, jeremy@...p.org,
	avi@...ranet.com, anthony@...emonkey.ws,
	virtualization@...ts.linux-foundation.org, rusty@...tcorp.com.au,
	ak@...e.de, chrisw@...s-sol.org, rostedt@...dmis.org,
	hpa@...or.com, zach@...are.com, roland@...hat.com,
	Glauber de Oliveira Costa <gcosta@...hat.com>
Subject: [PATCH 8/21] [PATCH] unify current_text_addr

current_text_addr() has a different implementation in x86_64 and
i386, but it is not fundamentally different. I stick to the i386
implementation, that seem to be a common base, and move it to processor.h

Signed-off-by: Glauber de Oliveira Costa <gcosta@...hat.com>
---
 include/asm-x86/processor.h    |   11 +++++++++++
 include/asm-x86/processor_32.h |    6 ------
 include/asm-x86/processor_64.h |    6 ------
 3 files changed, 11 insertions(+), 12 deletions(-)

Index: linux-2.6-x86/include/asm-x86/processor.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/processor.h
+++ linux-2.6-x86/include/asm-x86/processor.h
@@ -6,6 +6,17 @@
 #include <asm/page.h>
 #include <asm/system.h>
 
+/*
+ * Default implementation of macro that returns current
+ * instruction pointer ("program counter").
+ */
+static inline void *current_text_addr(void)
+{
+	void *pc;
+	asm volatile("mov $1f,%0\n1:":"=r" (pc));
+	return pc;
+}
+
 static inline void native_cpuid(unsigned int *eax, unsigned int *ebx,
 					 unsigned int *ecx, unsigned int *edx)
 {
Index: linux-2.6-x86/include/asm-x86/processor_32.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/processor_32.h
+++ linux-2.6-x86/include/asm-x86/processor_32.h
@@ -22,12 +22,6 @@
 #include <asm/desc_defs.h>
 
 /*
- * Default implementation of macro that returns current
- * instruction pointer ("program counter").
- */
-#define current_text_addr() ({ void *pc; __asm__("movl $1f,%0\n1:":"=g" (pc)); pc; })
-
-/*
  *  CPU type and hardware bug flags. Kept separately for each CPU.
  *  Members of this structure are referenced in head.S, so think twice
  *  before touching them. [mj]
Index: linux-2.6-x86/include/asm-x86/processor_64.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/processor_64.h
+++ linux-2.6-x86/include/asm-x86/processor_64.h
@@ -21,12 +21,6 @@
 #include <asm/desc_defs.h>
 
 /*
- * Default implementation of macro that returns current
- * instruction pointer ("program counter").
- */
-#define current_text_addr() ({ void *pc; asm volatile("leaq 1f(%%rip),%0\n1:":"=r"(pc)); pc; })
-
-/*
  *  CPU type and hardware bug flags. Kept separately for each CPU.
  */
 
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