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

[David Vrabel <david.vrabel@citrix.com>]

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

Signed-off-by: David Vrabel <david.vrabel@citrix.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