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authorAkinobu Mita <akinobu.mita@gmail.com>2010-05-26 14:43:32 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-05-27 09:12:48 -0700
commit80b5184cc537718122e036afe7e62d202b70d077 (patch)
treed4e2b400f0e951156d64d546fd563fa5a8ab02d3 /kernel
parentad84bb5b98bf81deae97e3bcd814675d6b4e6f72 (diff)
kernel/: convert cpu notifier to return encapsulate errno value
By the previous modification, the cpu notifier can return encapsulate errno value. This converts the cpu notifiers for kernel/*.c Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/padata.c4
-rw-r--r--kernel/profile.c4
-rw-r--r--kernel/relay.c2
-rw-r--r--kernel/smp.c2
-rw-r--r--kernel/softirq.c2
-rw-r--r--kernel/timer.c7
-rw-r--r--kernel/workqueue.c9
7 files changed, 17 insertions, 13 deletions
diff --git a/kernel/padata.c b/kernel/padata.c
index b1c9857f840..fdd8ae609ce 100644
--- a/kernel/padata.c
+++ b/kernel/padata.c
@@ -659,7 +659,7 @@ static int padata_cpu_callback(struct notifier_block *nfb,
err = __padata_add_cpu(pinst, cpu);
mutex_unlock(&pinst->lock);
if (err)
- return NOTIFY_BAD;
+ return notifier_from_errno(err);
break;
case CPU_DOWN_PREPARE:
@@ -670,7 +670,7 @@ static int padata_cpu_callback(struct notifier_block *nfb,
err = __padata_remove_cpu(pinst, cpu);
mutex_unlock(&pinst->lock);
if (err)
- return NOTIFY_BAD;
+ return notifier_from_errno(err);
break;
case CPU_UP_CANCELED:
diff --git a/kernel/profile.c b/kernel/profile.c
index dfadc5b729f..1e6a0d94ea6 100644
--- a/kernel/profile.c
+++ b/kernel/profile.c
@@ -372,7 +372,7 @@ static int __cpuinit profile_cpu_callback(struct notifier_block *info,
GFP_KERNEL | __GFP_ZERO,
0);
if (!page)
- return NOTIFY_BAD;
+ return notifier_from_errno(-ENOMEM);
per_cpu(cpu_profile_hits, cpu)[1] = page_address(page);
}
if (!per_cpu(cpu_profile_hits, cpu)[0]) {
@@ -388,7 +388,7 @@ out_free:
page = virt_to_page(per_cpu(cpu_profile_hits, cpu)[1]);
per_cpu(cpu_profile_hits, cpu)[1] = NULL;
__free_page(page);
- return NOTIFY_BAD;
+ return notifier_from_errno(-ENOMEM);
case CPU_ONLINE:
case CPU_ONLINE_FROZEN:
if (prof_cpu_mask != NULL)
diff --git a/kernel/relay.c b/kernel/relay.c
index 4268287148c..c7cf397fb92 100644
--- a/kernel/relay.c
+++ b/kernel/relay.c
@@ -539,7 +539,7 @@ static int __cpuinit relay_hotcpu_callback(struct notifier_block *nb,
"relay_hotcpu_callback: cpu %d buffer "
"creation failed\n", hotcpu);
mutex_unlock(&relay_channels_mutex);
- return NOTIFY_BAD;
+ return notifier_from_errno(-ENOMEM);
}
}
mutex_unlock(&relay_channels_mutex);
diff --git a/kernel/smp.c b/kernel/smp.c
index 3fc69733618..75c970c715d 100644
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -52,7 +52,7 @@ hotplug_cfd(struct notifier_block *nfb, unsigned long action, void *hcpu)
case CPU_UP_PREPARE_FROZEN:
if (!zalloc_cpumask_var_node(&cfd->cpumask, GFP_KERNEL,
cpu_to_node(cpu)))
- return NOTIFY_BAD;
+ return notifier_from_errno(-ENOMEM);
break;
#ifdef CONFIG_HOTPLUG_CPU
diff --git a/kernel/softirq.c b/kernel/softirq.c
index 0db913a5c60..825e1126008 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -808,7 +808,7 @@ static int __cpuinit cpu_callback(struct notifier_block *nfb,
p = kthread_create(run_ksoftirqd, hcpu, "ksoftirqd/%d", hotcpu);
if (IS_ERR(p)) {
printk("ksoftirqd for %i failed\n", hotcpu);
- return NOTIFY_BAD;
+ return notifier_from_errno(PTR_ERR(p));
}
kthread_bind(p, hotcpu);
per_cpu(ksoftirqd, hotcpu) = p;
diff --git a/kernel/timer.c b/kernel/timer.c
index be394af5bc2..e3b8c697bde 100644
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -1680,11 +1680,14 @@ static int __cpuinit timer_cpu_notify(struct notifier_block *self,
unsigned long action, void *hcpu)
{
long cpu = (long)hcpu;
+ int err;
+
switch(action) {
case CPU_UP_PREPARE:
case CPU_UP_PREPARE_FROZEN:
- if (init_timers_cpu(cpu) < 0)
- return NOTIFY_BAD;
+ err = init_timers_cpu(cpu);
+ if (err < 0)
+ return notifier_from_errno(err);
break;
#ifdef CONFIG_HOTPLUG_CPU
case CPU_DEAD:
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 77dabbf64b8..327d2deb445 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -1110,7 +1110,7 @@ static int __devinit workqueue_cpu_callback(struct notifier_block *nfb,
unsigned int cpu = (unsigned long)hcpu;
struct cpu_workqueue_struct *cwq;
struct workqueue_struct *wq;
- int ret = NOTIFY_OK;
+ int err = 0;
action &= ~CPU_TASKS_FROZEN;
@@ -1124,12 +1124,13 @@ undo:
switch (action) {
case CPU_UP_PREPARE:
- if (!create_workqueue_thread(cwq, cpu))
+ err = create_workqueue_thread(cwq, cpu);
+ if (!err)
break;
printk(KERN_ERR "workqueue [%s] for %i failed\n",
wq->name, cpu);
action = CPU_UP_CANCELED;
- ret = NOTIFY_BAD;
+ err = -ENOMEM;
goto undo;
case CPU_ONLINE:
@@ -1150,7 +1151,7 @@ undo:
cpumask_clear_cpu(cpu, cpu_populated_map);
}
- return ret;
+ return notifier_from_errno(err);
}
#ifdef CONFIG_SMP