linux-kernel - [PATCH 1/2] kvm: move address_mask define to static function

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Date:	Mon, 04 Feb 2008 17:22:57 -0800
From:	Harvey Harrison <harvey.harrison@...il.com>
To:	Avi Kivity <avi@...ranet.com>, Yaniv Kamay <yaniv@...ranet.com>
Cc:	Ingo Molnar <mingo@...e.hu>, LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH 1/2] kvm: move address_mask define to static function

Signed-off-by: Harvey Harrison <harvey.harrison@...il.com>
---
 arch/x86/kvm/x86_emulate.c |   22 ++++++++++++++++------
 1 files changed, 16 insertions(+), 6 deletions(-)

diff --git a/arch/x86/kvm/x86_emulate.c b/arch/x86/kvm/x86_emulate.c
index 7958600..649e14d 100644
--- a/arch/x86/kvm/x86_emulate.c
+++ b/arch/x86/kvm/x86_emulate.c
@@ -427,11 +427,21 @@ static u16 twobyte_table[256] = {
 })
 
 /* Access/update address held in a register, based on addressing mode. */
-#define address_mask(reg)						\
-	((c->ad_bytes == sizeof(unsigned long)) ? 			\
-		(reg) :	((reg) & ((1UL << (c->ad_bytes << 3)) - 1)))
+static inline unsigned long ad_mask(struct decode_cache *c)
+{
+	return (1UL << (c->ad_bytes << 3)) - 1;
+}
+
+static unsigned long address_mask(struct decode_cache *c, unsigned long reg)
+{
+	if (c->ad_bytes == sizeof(unsigned long))
+		return reg;
+	else
+		return reg & ad_mask(c);
+}
+
 #define register_address(base, reg)                                     \
-	((base) + address_mask(reg))
+	((base) + address_mask(c, reg))
 #define register_address_increment(reg, inc)                            \
 	do {								\
 		/* signed type ensures sign extension to long */        \
@@ -1393,7 +1403,7 @@ special_insn:
 				1,
 				(c->d & ByteOp) ? 1 : c->op_bytes,
 				c->rep_prefix ?
-				address_mask(c->regs[VCPU_REGS_RCX]) : 1,
+				address_mask(c, c->regs[VCPU_REGS_RCX]) : 1,
 				(ctxt->eflags & EFLG_DF),
 				register_address(ctxt->es_base,
 						 c->regs[VCPU_REGS_RDI]),
@@ -1409,7 +1419,7 @@ special_insn:
 				0,
 				(c->d & ByteOp) ? 1 : c->op_bytes,
 				c->rep_prefix ?
-				address_mask(c->regs[VCPU_REGS_RCX]) : 1,
+				address_mask(c, c->regs[VCPU_REGS_RCX]) : 1,
 				(ctxt->eflags & EFLG_DF),
 				register_address(c->override_base ?
 							*c->override_base :
-- 
1.5.4.rc5.1138.g2602


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