commit 4868402d9582bfb00a5f0157ae5d7ffd2d539fb0
author Alexander Potashev <aspotashev@gmail.com> Sat Oct 24 03:37:23 2009 +0400
committer Ingo Molnar <mingo@elte.hu> Sat Oct 24 11:06:38 2009 +0200
tree 317ed346e8415fa959c8e0a3d3e0af62961b5401
parent b1258ac2963d42ee7e807d2993d15e3dd39ff4b0

x86, boot: Simplify setting of the PAE bit

A single 'movl' is shorter than the 'xorl'-'orl' pair.
No change in behaviour.

Signed-off-by: Alexander Potashev <aspotashev@gmail.com>
LKML-Reference: <1256341043-4928-1-git-send-email-aspotashev@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/boot/compressed/head_64.S

diff --git a/arch/x86/boot/compressed/head_64.S b/arch/x86/boot/compressed/head_64.S
index 077e1b6..faff0dc 100644
--- a/arch/x86/boot/compressed/head_64.S
+++ b/arch/x86/boot/compressed/head_64.S
@@ -107,8 +107,7 @@
 	lgdt	gdt(%ebp)
 
 	/* Enable PAE mode */
-	xorl	%eax, %eax
-	orl	$(X86_CR4_PAE), %eax
+	movl	$(X86_CR4_PAE), %eax
 	movl	%eax, %cr4
 
  /*