linux-kernel - Re: [PATCH] x86: x86_{phys,virt}

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Date:	Tue, 9 Sep 2008 09:47:27 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Jan Beulich <jbeulich@...ell.com>
Cc:	Yinghai Lu <yhlu.kernel@...il.com>, tglx@...utronix.de,
	linux-kernel@...r.kernel.org, hpa@...or.com
Subject: Re: [PATCH] x86: x86_{phys,virt}_bits field also for i386 (v3)


* Jan Beulich <jbeulich@...ell.com> wrote:

> Make the x86_{phys,virt}_bits common for 32- and 64-bits, and use the
> former in ioremap's phys_addr_valid() check also on 32bit/PAE.
> 
> Signed-off-by: Jan Beulich <jbeulich@...ell.com>

thanks, i've applied the delta below.

	Ingo

---------->
>From b9397fe215791b4f83bda23b9f3c0d5200e94558 Mon Sep 17 00:00:00 2001
From: Ingo Molnar <mingo@...e.hu>
Date: Tue, 9 Sep 2008 09:45:32 +0200
Subject: [PATCH] x86: x86_{phys,virt}_bits field also for i386, fix

fix mismerge.

Signed-off-by: Jan Beulich <jbeulich@...ell.com>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 arch/x86/kernel/cpu/common.c |   15 +++++----------
 arch/x86/mm/ioremap.c        |    2 +-
 2 files changed, 6 insertions(+), 11 deletions(-)

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index df6c387..b26c09e 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -439,6 +439,11 @@ void __cpuinit cpu_detect(struct cpuinfo_x86 *c)
 			c->x86_cache_alignment = c->x86_clflush_size;
 		}
 	}
+
+#ifdef CONFIG_X86_32
+	if (cpu_has(c, X86_FEATURE_PAE) || cpu_has(c, X86_FEATURE_PSE36))
+		c->x86_phys_bits = 36;
+#endif
 }
 
 static void __cpuinit get_cpu_cap(struct cpuinfo_x86 *c)
@@ -520,11 +525,6 @@ static void __init early_identify_cpu(struct cpuinfo_x86 *c)
 
 	cpu_detect(c);
 
-#ifdef CONFIG_X86_32
-	if (cpu_has(c, X86_FEATURE_PAE) || cpu_has(c, X86_FEATURE_PSE36))
-		c->x86_phys_bits = 36;
-#endif
-
 	get_cpu_vendor(c);
 
 	get_cpu_cap(c);
@@ -667,11 +667,6 @@ static void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
 
 	generic_identify(c);
 
-#ifdef CONFIG_X86_32
-	if (cpu_has(c, X86_FEATURE_PAE) || cpu_has(c, X86_FEATURE_PSE36))
-		c->x86_phys_bits = 36;
-#endif
-
 	if (this_cpu->c_identify)
 		this_cpu->c_identify(c);
 
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index 74d16f2..ce207ba 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -25,7 +25,7 @@
 static inline int phys_addr_valid(unsigned long addr)
 {
 #ifdef CONFIG_RESOURCES_64BIT
-	return addr < (1UL << boot_cpu_data.x86_phys_bits);
+	return !(addr >> boot_cpu_data.x86_phys_bits);
 #else
 	return 1;
 #endif
--
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