Merge branch 'linus' into x86/x2apic

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

diff --git a/include/asm-x86/processor.h b/include/asm-x86/processor.h
index 55402d2ab9380e3f621c889503af1cec0abd9851..d2bf5fe8f4ffa19923ee68c297786b965ca226ba 100644 (file)
--- a/include/asm-x86/processor.h
+++ b/include/asm-x86/processor.h
@@ -134,7 +134,7 @@ extern __u32                        cleared_cpu_caps[NCAPINTS];
 #ifdef CONFIG_SMP
 DECLARE_PER_CPU(struct cpuinfo_x86, cpu_info);
 #define cpu_data(cpu)          per_cpu(cpu_info, cpu)
-#define current_cpu_data       cpu_data(smp_processor_id())
+#define current_cpu_data       __get_cpu_var(cpu_info)
 #else
 #define cpu_data(cpu)          boot_cpu_data
 #define current_cpu_data       boot_cpu_data
@@ -161,6 +161,7 @@ extern void init_scattered_cpuid_features(struct cpuinfo_x86 *c);
 extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c);
 extern unsigned short num_cache_leaves;
 
+extern void detect_extended_topology(struct cpuinfo_x86 *c);
 #if defined(CONFIG_X86_HT) || defined(CONFIG_X86_64)
 extern void detect_ht(struct cpuinfo_x86 *c);
 #else
@@ -722,14 +723,35 @@ static inline void __sti_mwait(unsigned long eax, unsigned long ecx)
 
 extern void mwait_idle_with_hints(unsigned long eax, unsigned long ecx);
 
-extern int                     force_mwait;
-
 extern void select_idle_routine(const struct cpuinfo_x86 *c);
 
 extern unsigned long           boot_option_idle_override;
 extern unsigned long           idle_halt;
 extern unsigned long           idle_nomwait;
 
+/*
+ * on systems with caches, caches must be flashed as the absolute
+ * last instruction before going into a suspended halt.  Otherwise,
+ * dirty data can linger in the cache and become stale on resume,
+ * leading to strange errors.
+ *
+ * perform a variety of operations to guarantee that the compiler
+ * will not reorder instructions.  wbinvd itself is serializing
+ * so the processor will not reorder.
+ *
+ * Systems without cache can just go into halt.
+ */
+static inline void wbinvd_halt(void)
+{
+       mb();
+       /* check for clflush to determine if wbinvd is legal */
+       if (cpu_has_clflush)
+               asm volatile("cli; wbinvd; 1: hlt; jmp 1b" : : : "memory");
+       else
+               while (1)
+                       halt();
+}
+
 extern void enable_sep_cpu(void);
 extern int sysenter_setup(void);