1 files changed, 4 insertions, 3 deletions

diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 763df77343dd..03273b6c272c 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -638,7 +638,7 @@ wakeup_secondary_cpu_via_init(int phys_apicid, unsigned long start_eip)
          * target processor state.
          */
         startup_ipi_hook(phys_apicid, (unsigned long) start_secondary,
-                         (unsigned long)stack_start.sp);
+                         stack_start);
 
         /*
          * Run STARTUP IPI loop.
@@ -785,7 +785,7 @@ do_rest:
 #endif
         early_gdt_descr.address = (unsigned long)get_cpu_gdt_table(cpu);
         initial_code = (unsigned long)start_secondary;
-        stack_start.sp = (void *) c_idle.idle->thread.sp;
+        stack_start  = c_idle.idle->thread.sp;
 
         /* start_ip had better be page-aligned! */
         start_ip = setup_trampoline();
@@ -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;