[TCP]: DSACK signals data receival, be conservative

[linux-2.6] / net / iucv / iucv.c

diff --git a/net/iucv/iucv.c b/net/iucv/iucv.c
index b7333061016dfffbf8122460f63dda56e724a3c8..983058d432dc8c613f63a48af80db1997679dd3f 100644 (file)
--- a/net/iucv/iucv.c
+++ b/net/iucv/iucv.c
@@ -479,7 +479,8 @@ static void iucv_setmask_mp(void)
                /* Enable all cpus with a declared buffer. */
                if (cpu_isset(cpu, iucv_buffer_cpumask) &&
                    !cpu_isset(cpu, iucv_irq_cpumask))
-                       smp_call_function_on(iucv_allow_cpu, NULL, 0, 1, cpu);
+                       smp_call_function_single(cpu, iucv_allow_cpu,
+                                                NULL, 0, 1);
        preempt_enable();
 }
 
@@ -497,7 +498,7 @@ static void iucv_setmask_up(void)
        cpumask = iucv_irq_cpumask;
        cpu_clear(first_cpu(iucv_irq_cpumask), cpumask);
        for_each_cpu_mask(cpu, cpumask)
-               smp_call_function_on(iucv_block_cpu, NULL, 0, 1, cpu);
+               smp_call_function_single(cpu, iucv_block_cpu, NULL, 0, 1);
 }
 
 /**
@@ -522,7 +523,7 @@ static int iucv_enable(void)
        rc = -EIO;
        preempt_disable();
        for_each_online_cpu(cpu)
-               smp_call_function_on(iucv_declare_cpu, NULL, 0, 1, cpu);
+               smp_call_function_single(cpu, iucv_declare_cpu, NULL, 0, 1);
        preempt_enable();
        if (cpus_empty(iucv_buffer_cpumask))
                /* No cpu could declare an iucv buffer. */
@@ -578,7 +579,7 @@ static int __cpuinit iucv_cpu_notify(struct notifier_block *self,
        case CPU_ONLINE_FROZEN:
        case CPU_DOWN_FAILED:
        case CPU_DOWN_FAILED_FROZEN:
-               smp_call_function_on(iucv_declare_cpu, NULL, 0, 1, cpu);
+               smp_call_function_single(cpu, iucv_declare_cpu, NULL, 0, 1);
                break;
        case CPU_DOWN_PREPARE:
        case CPU_DOWN_PREPARE_FROZEN:
@@ -587,10 +588,10 @@ static int __cpuinit iucv_cpu_notify(struct notifier_block *self,
                if (cpus_empty(cpumask))
                        /* Can't offline last IUCV enabled cpu. */
                        return NOTIFY_BAD;
-               smp_call_function_on(iucv_retrieve_cpu, NULL, 0, 1, cpu);
+               smp_call_function_single(cpu, iucv_retrieve_cpu, NULL, 0, 1);
                if (cpus_empty(iucv_irq_cpumask))
-                       smp_call_function_on(iucv_allow_cpu, NULL, 0, 1,
-                                            first_cpu(iucv_buffer_cpumask));
+                       smp_call_function_single(first_cpu(iucv_buffer_cpumask),
+                                                iucv_allow_cpu, NULL, 0, 1);
                break;
        }
        return NOTIFY_OK;
@@ -1494,7 +1495,10 @@ static void iucv_tasklet_fn(unsigned long ignored)
        struct iucv_irq_list *p, *n;
 
        /* Serialize tasklet, iucv_path_sever and iucv_path_connect. */
-       spin_lock(&iucv_table_lock);
+       if (!spin_trylock(&iucv_table_lock)) {
+               tasklet_schedule(&iucv_tasklet);
+               return;
+       }
        iucv_active_cpu = smp_processor_id();
 
        spin_lock_irq(&iucv_queue_lock);