x86: provide hlt_works function.

In x86_64, hlt always work. in i386, we'll query the cpuinfo associated
with this cpu

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/include/asm-x86/processor.h b/include/asm-x86/processor.h
index 9054734..8bec23c 100644 (file)
--- a/include/asm-x86/processor.h
+++ b/include/asm-x86/processor.h
@@ -144,6 +144,15 @@ DECLARE_PER_CPU(struct cpuinfo_x86, cpu_info);
 #define current_cpu_data       boot_cpu_data
 #endif
 
+static inline int hlt_works(int cpu)
+{
+#ifdef CONFIG_X86_32
+       return cpu_data(cpu).hlt_works_ok;
+#else
+       return 1;
+#endif
+}
+
 #define cache_line_size()      (boot_cpu_data.x86_cache_alignment)
 
 extern void cpu_detect(struct cpuinfo_x86 *c);