linux-kernel - [tip:x86/mm] x86: init_memory_mapping() PSE and PGE setup ifdef removal

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Message-ID: <tip-ac4d3bfdd9e27bfcc0b016c7ac364acb166455a1@git.kernel.org>
Date:	Fri, 6 Mar 2009 14:28:01 GMT
From:	Pekka Enberg <penberg@...helsinki.fi>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	penberg@...helsinki.fi, tglx@...utronix.de, mingo@...e.hu
Subject: [tip:x86/mm] x86: init_memory_mapping() PSE and PGE setup ifdef removal

Commit-ID:  ac4d3bfdd9e27bfcc0b016c7ac364acb166455a1
Gitweb:     http://git.kernel.org/tip/ac4d3bfdd9e27bfcc0b016c7ac364acb166455a1
Author:     "Pekka Enberg" <penberg@...helsinki.fi>
AuthorDate: Thu, 5 Mar 2009 17:22:21 +0200
Commit:     Ingo Molnar <mingo@...e.hu>
CommitDate: Fri, 6 Mar 2009 15:25:53 +0100

x86: init_memory_mapping() PSE and PGE setup ifdef removal

Impact: cleanup

Section 3.10 ("PAE-Enabled Paging in IA-32e Mode") of the Intel manual
states that The CR4.PSE bit is ignored in IA-32e mode. In 64-bit mode,
PGE is enabled at early boot so there's no need to hide setting them up
in an ifdef.

Signed-off-by: Pekka Enberg <penberg@...helsinki.fi>
LKML-Reference: <1236266541.31324.14.camel@...berg-laptop>
Signed-off-by: Ingo Molnar <mingo@...e.hu>


---
 arch/x86/mm/init.c |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)

diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index 5d06d25..e7d8bb5 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -223,7 +223,6 @@ unsigned long __init_refok init_memory_mapping(unsigned long start,
 	if (nx_enabled)
 		printk(KERN_INFO "NX (Execute Disable) protection: active\n");
 
-#ifdef CONFIG_X86_32
 	/* Enable PSE if available */
 	if (cpu_has_pse)
 		set_in_cr4(X86_CR4_PSE);
@@ -233,7 +232,6 @@ unsigned long __init_refok init_memory_mapping(unsigned long start,
 		set_in_cr4(X86_CR4_PGE);
 		__supported_pte_mask |= _PAGE_GLOBAL;
 	}
-#endif
 
 	if (use_gbpages)
 		page_size_mask |= 1 << PG_LEVEL_1G;
--
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