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Diffstat (limited to 'arch/x86/kernel/smpboot.c')
-rw-r--r--arch/x86/kernel/smpboot.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index c7149c96d07..0cbe8c0b35e 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -97,12 +97,12 @@ static DEFINE_PER_CPU(struct task_struct *, idle_thread_array);
*/
static DEFINE_MUTEX(x86_cpu_hotplug_driver_mutex);
-void cpu_hotplug_driver_lock()
+void cpu_hotplug_driver_lock(void)
{
mutex_lock(&x86_cpu_hotplug_driver_mutex);
}
-void cpu_hotplug_driver_unlock()
+void cpu_hotplug_driver_unlock(void)
{
mutex_unlock(&x86_cpu_hotplug_driver_mutex);
}
@@ -1402,8 +1402,9 @@ static inline void mwait_play_dead(void)
unsigned int highest_subcstate = 0;
int i;
void *mwait_ptr;
+ struct cpuinfo_x86 *c = __this_cpu_ptr(&cpu_info);
- if (!cpu_has(__this_cpu_ptr(&cpu_info), X86_FEATURE_MWAIT))
+ if (!(cpu_has(c, X86_FEATURE_MWAIT) && mwait_usable(c)))
return;
if (!cpu_has(__this_cpu_ptr(&cpu_info), X86_FEATURE_CLFLSH))
return;