Messages in this thread Patch in this message |  | | | Date | Tue, 13 May 2008 20:55:39 +0400 | | From | Cyrill Gorcunov <> | | Subject | [patch 1/2] x86: head_64.S cleanup - use straight move to CR4 register | |
There is no need for testing the values because we already know
what they should be. Just set them in straight way.
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
---
Index: linux-2.6.git/arch/x86/kernel/head_64.S
===================================================================
--- linux-2.6.git.orig/arch/x86/kernel/head_64.S 2008-05-13 19:17:31.000000000 +0400
+++ linux-2.6.git/arch/x86/kernel/head_64.S 2008-05-13 19:35:11.000000000 +0400
@@ -155,9 +155,7 @@ ENTRY(secondary_startup_64)
*/
/* Enable PAE mode and PGE */
- xorq %rax, %rax
- btsq $5, %rax
- btsq $7, %rax
+ movq $(X86_CR4_PAE | X86_CR4_PGE), %rax
movq %rax, %cr4
/* Setup early boot stage 4 level pagetables. */
--
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