x86: relocate_kernel - use predefined macroses for processor state

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 9 insertions, 8 deletions

diff --git a/arch/x86/kernel/relocate_kernel_32.S b/arch/x86/kernel/relocate_kernel_32.S
index ce12bb8678ad..a7ecc8e0bc67 100644
--- a/arch/x86/kernel/relocate_kernel_32.S
+++ b/arch/x86/kernel/relocate_kernel_32.S
@@ -9,6 +9,7 @@
 #include <linux/linkage.h>
 #include <asm/page.h>
 #include <asm/kexec.h>
+#include <asm/processor-flags.h>
 
 /*
  * Must be relocatable PIC code callable as a C function
@@ -167,16 +168,16 @@ identity_mapped:
         pushl   %edx
 
         /* Set cr0 to a known state:
-         * 31 0 == Paging disabled
-         * 18 0 == Alignment check disabled
-         * 16 0 == Write protect disabled
-         * 3  0 == No task switch
-         * 2  0 == Don't do FP software emulation.
-         * 0  1 == Proctected mode enabled
+         *  - Paging disabled
+         *  - Alignment check disabled
+         *  - Write protect disabled
+         *  - No task switch
+         *  - Don't do FP software emulation.
+         *  - Proctected mode enabled
          */
         movl    %cr0, %eax
-        andl    $~((1<<31)|(1<<18)|(1<<16)|(1<<3)|(1<<2)), %eax
-        orl     $(1<<0), %eax
+        andl    $~(X86_CR0_PG | X86_CR0_AM | X86_CR0_WP | X86_CR0_TS | X86_CR0_EM), %eax
+        orl     $(X86_CR0_PE), %eax
         movl    %eax, %cr0
 
         /* clear cr4 if applicable */