X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=kernel%2Fsoftirq.c;h=336f92d64e2ec04bb56d7146a4fc1e1eeb1141f5;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=582a1e8091bc651fcf714b3a6aeb7732ce9244f5;hpb=6a77f38946aaee1cd85eeec6cf4229b204c15071;p=linux-2.6.git

diff --git a/kernel/softirq.c b/kernel/softirq.c
index 582a1e809..336f92d64 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -16,6 +16,7 @@
 #include <linux/cpu.h>
 #include <linux/kthread.h>
 #include <linux/rcupdate.h>
+#include <linux/smp.h>
 
 #include <asm/irq.h>
 /*
@@ -84,7 +85,7 @@ asmlinkage void __do_softirq(void)
 	cpu = smp_processor_id();
 restart:
 	/* Reset the pending bitmask before enabling irqs */
-	local_softirq_pending() = 0;
+	set_softirq_pending(0);
 
 	local_irq_enable();
 
@@ -355,8 +356,12 @@ static int ksoftirqd(void * __bind_cpu)
 	set_current_state(TASK_INTERRUPTIBLE);
 
 	while (!kthread_should_stop()) {
-		if (!local_softirq_pending())
+		preempt_disable();
+		if (!local_softirq_pending()) {
+			preempt_enable_no_resched();
 			schedule();
+			preempt_disable();
+		}
 
 		__set_current_state(TASK_RUNNING);
 
@@ -364,14 +369,14 @@ static int ksoftirqd(void * __bind_cpu)
 			/* Preempt disable stops cpu going offline.
 			   If already offline, we'll be on wrong CPU:
 			   don't process */
-			preempt_disable();
 			if (cpu_is_offline((long)__bind_cpu))
 				goto wait_to_die;
 			do_softirq();
-			preempt_enable();
+			preempt_enable_no_resched();
 			cond_resched();
+			preempt_disable();
 		}
-
+		preempt_enable();
 		set_current_state(TASK_INTERRUPTIBLE);
 	}
 	__set_current_state(TASK_RUNNING);
@@ -441,7 +446,7 @@ static void takeover_tasklets(unsigned int cpu)
 }
 #endif /* CONFIG_HOTPLUG_CPU */
 
-static int __devinit cpu_callback(struct notifier_block *nfb,
+static int cpu_callback(struct notifier_block *nfb,
 				  unsigned long action,
 				  void *hcpu)
 {
@@ -466,7 +471,8 @@ static int __devinit cpu_callback(struct notifier_block *nfb,
 #ifdef CONFIG_HOTPLUG_CPU
 	case CPU_UP_CANCELED:
 		/* Unbind so it can run.  Fall thru. */
-		kthread_bind(per_cpu(ksoftirqd, hotcpu), smp_processor_id());
+		kthread_bind(per_cpu(ksoftirqd, hotcpu),
+			     any_online_cpu(cpu_online_map));
 	case CPU_DEAD:
 		p = per_cpu(ksoftirqd, hotcpu);
 		per_cpu(ksoftirqd, hotcpu) = NULL;
@@ -478,7 +484,7 @@ static int __devinit cpu_callback(struct notifier_block *nfb,
 	return NOTIFY_OK;
 }
 
-static struct notifier_block __devinitdata cpu_nfb = {
+static struct notifier_block cpu_nfb = {
 	.notifier_call = cpu_callback
 };
 
@@ -490,3 +496,22 @@ __init int spawn_ksoftirqd(void)
 	register_cpu_notifier(&cpu_nfb);
 	return 0;
 }
+
+#ifdef CONFIG_SMP
+/*
+ * Call a function on all processors
+ */
+int on_each_cpu(void (*func) (void *info), void *info, int retry, int wait)
+{
+	int ret = 0;
+
+	preempt_disable();
+	ret = smp_call_function(func, info, retry, wait);
+	local_irq_disable();
+	func(info);
+	local_irq_enable();
+	preempt_enable();
+	return ret;
+}
+EXPORT_SYMBOL(on_each_cpu);
+#endif