linux-kernel - [PATCH 3/4] x86: add desc_equal() to compare GDT descriptors

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Date:	Mon, 9 Jul 2012 11:39:07 +0100
From:	David Vrabel <david.vrabel@...rix.com>
To:	xen-devel@...ts.xensource.com
CC:	"David Vrabel" <david.vrabel@...rix.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 3/4] x86: add desc_equal() to compare GDT descriptors

From: David Vrabel <david.vrabel@...rix.com>

Signed-off-by: David Vrabel <david.vrabel@...rix.com>
---
 arch/x86/include/asm/desc.h |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/arch/x86/include/asm/desc.h b/arch/x86/include/asm/desc.h
index 8bf1c06..d26f059 100644
--- a/arch/x86/include/asm/desc.h
+++ b/arch/x86/include/asm/desc.h
@@ -85,6 +85,12 @@ static inline int desc_empty(const void *ptr)
 	return !(desc[0] | desc[1]);
 }
 
+static inline bool desc_equal(const struct desc_struct *d1,
+			      const struct desc_struct *d2)
+{
+	return d1->a == d2->a && d1->b == d2->b;
+}
+
 #ifdef CONFIG_PARAVIRT
 #include <asm/paravirt.h>
 #else
-- 
1.7.2.5

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