Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6

[linux-2.6-omap-h63xx.git] / include / asm-x86 / apic.h

diff --git a/include/asm-x86/apic.h b/include/asm-x86/apic.h
index 1311c82b165bf45ad373c6af43a2193de00a013a..ef1d72dbdfe02b74d389c2067af12373db2cd3de 100644 (file)
--- a/include/asm-x86/apic.h
+++ b/include/asm-x86/apic.h
@@ -40,8 +40,6 @@ extern void generic_apic_probe(void);
 extern unsigned int apic_verbosity;
 extern int local_apic_timer_c2_ok;
 
-extern int ioapic_force;
-
 extern int disable_apic;
 /*
  * Basic functions accessing APICs.
@@ -100,6 +98,20 @@ extern void check_x2apic(void);
 extern void enable_x2apic(void);
 extern void enable_IR_x2apic(void);
 extern void x2apic_icr_write(u32 low, u32 id);
+static inline int x2apic_enabled(void)
+{
+       int msr, msr2;
+
+       if (!cpu_has_x2apic)
+               return 0;
+
+       rdmsr(MSR_IA32_APICBASE, msr, msr2);
+       if (msr & X2APIC_ENABLE)
+               return 1;
+       return 0;
+}
+#else
+#define x2apic_enabled()       0
 #endif
 
 struct apic_ops {
@@ -134,9 +146,7 @@ static inline void ack_x2APIC_irq(void)
 static inline void ack_APIC_irq(void)
 {
        /*
-        * ack_APIC_irq() actually gets compiled as a single instruction:
-        * - a single rmw on Pentium/82489DX
-        * - a single write on P6+ cores (CONFIG_X86_GOOD_APIC)
+        * ack_APIC_irq() actually gets compiled as a single instruction
         * ... yummie.
         */