1 files changed, 10 insertions, 6 deletions

diff --git a/arch/x86_64/kernel/smp.c b/arch/x86_64/kernel/smp.c
index 4a6628b14d99..5a1c0a3bf872 100644
--- a/arch/x86_64/kernel/smp.c
+++ b/arch/x86_64/kernel/smp.c
@@ -135,10 +135,10 @@ asmlinkage void smp_invalidate_interrupt(struct pt_regs *regs)
 
         cpu = smp_processor_id();
         /*
-         * orig_rax contains the interrupt vector - 256.
+         * orig_rax contains the negated interrupt vector.
          * Use that to determine where the sender put the data.
          */
-        sender = regs->orig_rax + 256 - INVALIDATE_TLB_VECTOR_START;
+        sender = ~regs->orig_rax - INVALIDATE_TLB_VECTOR_START;
         f = &per_cpu(flush_state, sender);
 
         if (!cpu_isset(cpu, f->flush_cpumask))
@@ -224,6 +224,7 @@ void flush_tlb_current_task(void)
                 flush_tlb_others(cpu_mask, mm, FLUSH_ALL);
         preempt_enable();
 }
+EXPORT_SYMBOL(flush_tlb_current_task);
 
 void flush_tlb_mm (struct mm_struct * mm)
 {
@@ -244,6 +245,7 @@ void flush_tlb_mm (struct mm_struct * mm)
 
         preempt_enable();
 }
+EXPORT_SYMBOL(flush_tlb_mm);
 
 void flush_tlb_page(struct vm_area_struct * vma, unsigned long va)
 {
@@ -266,6 +268,7 @@ void flush_tlb_page(struct vm_area_struct * vma, unsigned long va)
 
         preempt_enable();
 }
+EXPORT_SYMBOL(flush_tlb_page);
 
 static void do_flush_tlb_all(void* info)
 {
@@ -443,6 +446,7 @@ int smp_call_function (void (*func) (void *info), void *info, int nonatomic,
         spin_unlock(&call_lock);
         return 0;
 }
+EXPORT_SYMBOL(smp_call_function);
 
 void smp_stop_cpu(void)
 {
@@ -460,7 +464,7 @@ static void smp_really_stop_cpu(void *dummy)
 {
         smp_stop_cpu(); 
         for (;;) 
-                asm("hlt"); 
+                halt();
 } 
 
 void smp_send_stop(void)
@@ -470,7 +474,7 @@ void smp_send_stop(void)
                 return;
         /* Don't deadlock on the call lock in panic */
         if (!spin_trylock(&call_lock)) {
-                /* ignore locking because we have paniced anyways */
+                /* ignore locking because we have panicked anyways */
                 nolock = 1;
         }
         __smp_call_function(smp_really_stop_cpu, NULL, 0, 0);
@@ -520,13 +524,13 @@ asmlinkage void smp_call_function_interrupt(void)
 
 int safe_smp_processor_id(void)
 {
-        int apicid, i;
+        unsigned apicid, i;
 
         if (disable_apic)
                 return 0;
 
         apicid = hard_smp_processor_id();
-        if (x86_cpu_to_apicid[apicid] == apicid)
+        if (apicid < NR_CPUS && x86_cpu_to_apicid[apicid] == apicid)
                 return apicid;
 
         for (i = 0; i < NR_CPUS; ++i) {