[tip:x86/asm] x86, asm, cleanup: Replace open-coded control register values with symbolic

[tip-bot for H. Peter Anvin]

Commit-ID:  7d9b69263e883c4e69fbc1511cd80520369ed02f
Gitweb:     http://git.kernel.org/tip/7d9b69263e883c4e69fbc1511cd80520369ed02f
Author:     H. Peter Anvin <hpa@xxxxxxxxxxxxxxx>
AuthorDate: Sat, 27 Apr 2013 16:22:32 -0700
Committer:  H. Peter Anvin <hpa@xxxxxxxxxxxxxxx>
CommitDate: Tue, 25 Jun 2013 15:50:05 -0700

x86, asm, cleanup: Replace open-coded control register values with symbolic

Clean up an unnecessary open-coded control register values.

Signed-off-by: H. Peter Anvin <hpa@xxxxxxxxxxxxxxx>
Link: http://lkml.kernel.org/n/tip-um7za1nzf6brb17o0h4om6e3@xxxxxxxxxxxxxx
---
 arch/x86/kernel/cpu/mtrr/cyrix.c     | 2 +-
 arch/x86/kernel/cpu/mtrr/generic.c   | 2 +-
 arch/x86/kernel/relocate_kernel_32.S | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kernel/cpu/mtrr/cyrix.c b/arch/x86/kernel/cpu/mtrr/cyrix.c
index 68a3343..9e451b0 100644
--- a/arch/x86/kernel/cpu/mtrr/cyrix.c
+++ b/arch/x86/kernel/cpu/mtrr/cyrix.c
@@ -167,7 +167,7 @@ static void post_set(void)
 	setCx86(CX86_CCR3, ccr3);
 
 	/* Enable caches */
-	write_cr0(read_cr0() & 0xbfffffff);
+	write_cr0(read_cr0() & ~X86_CR0_CD);
 
 	/* Restore value of CR4 */
 	if (cpu_has_pge)
diff --git a/arch/x86/kernel/cpu/mtrr/generic.c b/arch/x86/kernel/cpu/mtrr/generic.c
index fa72a39..00f557b 100644
--- a/arch/x86/kernel/cpu/mtrr/generic.c
+++ b/arch/x86/kernel/cpu/mtrr/generic.c
@@ -701,7 +701,7 @@ static void post_set(void) __releases(set_atomicity_lock)
 	mtrr_wrmsr(MSR_MTRRdefType, deftype_lo, deftype_hi);
 
 	/* Enable caches */
-	write_cr0(read_cr0() & 0xbfffffff);
+	write_cr0(read_cr0() & ~X86_CR0_CD);
 
 	/* Restore value of CR4 */
 	if (cpu_has_pge)
diff --git a/arch/x86/kernel/relocate_kernel_32.S b/arch/x86/kernel/relocate_kernel_32.S
index 36818f8..e13f8e7 100644
--- a/arch/x86/kernel/relocate_kernel_32.S
+++ b/arch/x86/kernel/relocate_kernel_32.S
@@ -186,7 +186,7 @@ identity_mapped:
 	movl	CP_PA_PGD(%ebx), %eax
 	movl	%eax, %cr3
 	movl	%cr0, %eax
-	orl	$(1<<31), %eax
+	orl	$X86_CR0_PG, %eax
 	movl	%eax, %cr0
 	lea	PAGE_SIZE(%edi), %esp
 	movl	%edi, %eax
--
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