linux-kernel - [PATCH 1/2] x86: Add getter/setter static inlines for x86 descriptors

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Message-Id: <76c37743d20e5737eadc747cbdddbc2beb11f074.1238361501.git.ice799@gmail.com>
Date:	Sun, 29 Mar 2009 14:21:41 -0700
From:	Joe Damato <ice799@...il.com>
To:	linux-x86_64@...r.kernel.org, w@....eu, mingo@...e.hu,
	hpa@...or.com, jeremy@...p.org, linux-newbie@...r.kernel.org,
	kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	Joe Damato <ice799@...il.com>
Subject: [PATCH 1/2] x86: Add getter/setter static inlines for x86 descriptors

Static inline getters/setters have been provided to encourage consumers not to touch the internals of 32bit x86 descriptors directly.

Signed-off-by: Joe Damato <ice799@...il.com>
---
 arch/x86/include/asm/desc.h |   20 ++++++++++++++++++++
 1 files changed, 20 insertions(+), 0 deletions(-)

diff --git a/arch/x86/include/asm/desc.h b/arch/x86/include/asm/desc.h
index dc27705..c62cf93 100644
--- a/arch/x86/include/asm/desc.h
+++ b/arch/x86/include/asm/desc.h
@@ -44,6 +44,26 @@ static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu)
 	return per_cpu(gdt_page, cpu).gdt;
 }
 
+static inline void desc_set_lo(struct desc_struct *d, unsigned int lo)
+{
+	d->a = lo;
+}
+
+static inline void desc_set_hi(struct desc_struct *d, unsigned int hi)
+{
+	d->b = hi;
+}
+
+static inline unsigned int desc_get_lo(const struct desc_struct *d)
+{
+	return d->a;
+}
+
+static inline unsigned int desc_get_hi(const struct desc_struct *d)
+{
+	return d->b;
+}
+
 #ifdef CONFIG_X86_64
 
 static inline void pack_gate(gate_desc *gate, unsigned type, unsigned long func,
-- 
1.6.2

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