X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fx86_64%2Fkernel%2Fsmp.c;h=af1ec4d23cf89131f16e5063f31c81a6810c63ba;hb=97bf2856c6014879bd04983a3e9dfcdac1e7fe85;hp=e13938d2495257e37d0fa513b3b485457fb51ddf;hpb=4e76c8a9fa413ccc09d3f7f664183dcce3555d57;p=linux-2.6.git

diff --git a/arch/x86_64/kernel/smp.c b/arch/x86_64/kernel/smp.c
index e13938d24..af1ec4d23 100644
--- a/arch/x86_64/kernel/smp.c
+++ b/arch/x86_64/kernel/smp.c
@@ -203,7 +203,7 @@ int __cpuinit init_smp_flush(void)
 {
 	int i;
 	for_each_cpu_mask(i, cpu_possible_map) {
-		spin_lock_init(&per_cpu(flush_state.tlbstate_lock, i));
+		spin_lock_init(&per_cpu(flush_state, i).tlbstate_lock);
 	}
 	return 0;
 }
@@ -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)
 {
@@ -373,16 +376,20 @@ int smp_call_function_single (int cpu, void (*func) (void *info), void *info,
 	/* prevent preemption and reschedule on another processor */
 	int me = get_cpu();
 	if (cpu == me) {
-		WARN_ON(1);
 		put_cpu();
-		return -EBUSY;
+		return 0;
 	}
+
+	/* Can deadlock when called with interrupts disabled */
+	WARN_ON(irqs_disabled());
+
 	spin_lock_bh(&call_lock);
 	__smp_call_function_single(cpu, func, info, nonatomic, wait);
 	spin_unlock_bh(&call_lock);
 	put_cpu();
 	return 0;
 }
+EXPORT_SYMBOL(smp_call_function_single);
 
 /*
  * this function sends a 'generic call function' IPI to all other CPUs
@@ -443,6 +450,7 @@ 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 +468,7 @@ static void smp_really_stop_cpu(void *dummy)
 {
 	smp_stop_cpu(); 
 	for (;;) 
-		asm("hlt"); 
+		halt();
 } 
 
 void smp_send_stop(void)
@@ -470,7 +478,7 @@ 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);
@@ -518,26 +526,3 @@ asmlinkage void smp_call_function_interrupt(void)
 	}
 }
 
-int safe_smp_processor_id(void)
-{
-	int apicid, i;
-
-	if (disable_apic)
-		return 0;
-
-	apicid = hard_smp_processor_id();
-	if (x86_cpu_to_apicid[apicid] == apicid)
-		return apicid;
-
-	for (i = 0; i < NR_CPUS; ++i) {
-		if (x86_cpu_to_apicid[i] == apicid)
-			return i;
-	}
-
-	/* No entries in x86_cpu_to_apicid?  Either no MPS|ACPI,
-	 * or called too early.  Either way, we must be CPU 0. */
-      	if (x86_cpu_to_apicid[0] == BAD_APICID)
-		return 0;
-
-	return 0; /* Should not happen */
-}