[patch 02/23] x86/apic: Make x2apic_mode depend on CONFIG_X86_X2APIC

[Thomas Gleixner]

No point in having a static variable around which is always 0. Let the
compiler optimize code out if disabled.

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
 arch/x86/include/asm/apic.h |    8 ++++----
 arch/x86/kernel/apic/apic.c |    2 +-
 2 files changed, 5 insertions(+), 5 deletions(-)

Index: tip/arch/x86/include/asm/apic.h
===================================================================
--- tip.orig/arch/x86/include/asm/apic.h
+++ tip/arch/x86/include/asm/apic.h
@@ -106,8 +106,6 @@ extern u32 native_safe_apic_wait_icr_idl
 extern void native_apic_icr_write(u32 low, u32 id);
 extern u64 native_apic_icr_read(void);
 
-extern int x2apic_mode;
-
 static inline bool apic_is_x2apic_enabled(void)
 {
 	u64 msr;
@@ -177,6 +175,7 @@ static inline u64 native_x2apic_icr_read
 	return val;
 }
 
+extern int x2apic_mode;
 extern int x2apic_phys;
 extern int x2apic_preenabled;
 extern void check_x2apic(void);
@@ -209,8 +208,9 @@ static inline void x2apic_force_phys(voi
 {
 }
 
-#define	x2apic_preenabled 0
-#define	x2apic_supported()	0
+#define x2apic_mode		(0)
+#define	x2apic_preenabled	(0)
+#define	x2apic_supported()	(0)
 #endif
 
 extern void enable_IR_x2apic(void);
Index: tip/arch/x86/kernel/apic/apic.c
===================================================================
--- tip.orig/arch/x86/kernel/apic/apic.c
+++ tip/arch/x86/kernel/apic/apic.c
@@ -161,8 +161,8 @@ static __init int setup_apicpmtimer(char
 __setup("apicpmtimer", setup_apicpmtimer);
 #endif
 
-int x2apic_mode;
 #ifdef CONFIG_X86_X2APIC
+int x2apic_mode;
 /* x2apic enabled before OS handover */
 int x2apic_preenabled;
 static int x2apic_disabled;


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