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| author | Gautham R Shenoy <ego@in.ibm.com> | 2008-01-25 21:08:02 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-25 21:08:02 +0100 |
| commit | 86ef5c9a8edd78e6bf92879f32329d89b2d55b5a (patch) | |
| tree | 7bf46885326a6fdbb0c3596855408e9a5634dd3a /drivers/s390/char | |
| parent | d221938c049f4845da13c8593132595a6b9222a8 (diff) | |
| download | linux-86ef5c9a8edd78e6bf92879f32329d89b2d55b5a.tar.gz | |
cpu-hotplug: replace lock_cpu_hotplug() with get_online_cpus()
Replace all lock_cpu_hotplug/unlock_cpu_hotplug from the kernel and use get_online_cpus and put_online_cpus instead as it highlights the refcount semantics in these operations. The new API guarantees protection against the cpu-hotplug operation, but it doesn't guarantee serialized access to any of the local data structures. Hence the changes needs to be reviewed. In case of pseries_add_processor/pseries_remove_processor, use cpu_maps_update_begin()/cpu_maps_update_done() as we're modifying the cpu_present_map there. Signed-off-by: Gautham R Shenoy <ego@in.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers/s390/char')
| -rw-r--r-- | drivers/s390/char/sclp_config.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/s390/char/sclp_config.c b/drivers/s390/char/sclp_config.c index 5322e5e54a98..9dc77f14fa52 100644 --- a/drivers/s390/char/sclp_config.c +++ b/drivers/s390/char/sclp_config.c @@ -29,12 +29,12 @@ static void sclp_cpu_capability_notify(struct work_struct *work) struct sys_device *sysdev; printk(KERN_WARNING TAG "cpu capability changed.\n"); - lock_cpu_hotplug(); + get_online_cpus(); for_each_online_cpu(cpu) { sysdev = get_cpu_sysdev(cpu); kobject_uevent(&sysdev->kobj, KOBJ_CHANGE); } - unlock_cpu_hotplug(); + put_online_cpus(); } static void sclp_conf_receiver_fn(struct evbuf_header *evbuf) |