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padata: Pass the padata cpumasks to the cpumask_change_notifier chain 

We pass a pointer to the new padata cpumasks to the cpumask_change_notifier
chain. So users can access the cpumasks without the need of an extra
padata_get_cpumask function.

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Steffen Klassert 2010-07-27 07:15:50 +02:00 committed by Herbert Xu
parent 65ff577e6b
commit c635696c7c
2 changed files with 23 additions and 20 deletions
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40
include/linux/padata.h
View File

@ -98,6 +98,16 @@ struct padata_parallel_queue {
int cpu_index;
};
/**
* struct padata_cpumask - The cpumasks for the parallel/serial workers
*
* @pcpu: cpumask for the parallel workers.
* @cbcpu: cpumask for the serial (callback) workers.
*/
struct padata_cpumask {
cpumask_var_t pcpu;
cpumask_var_t cbcpu;
};
/**
* struct parallel_data - Internal control structure, covers everything
@ -110,8 +120,7 @@ struct padata_parallel_queue {
* @reorder_objects: Number of objects waiting in the reorder queues.
* @refcnt: Number of objects holding a reference on this parallel_data.
* @max_seq_nr: Maximal used sequence number.
* @cpumask: Contains two cpumasks: pcpu and cbcpu for
* parallel and serial workers respectively.
* @cpumask: The cpumasks in use for parallel and serial workers.
* @lock: Reorder lock.
* @processed: Number of already processed objects.
* @timer: Reorder timer.
@ -120,17 +129,14 @@ struct parallel_data {
struct padata_instance *pinst;
struct padata_parallel_queue *pqueue;
struct padata_serial_queue *squeue;
atomic_t seq_nr;
atomic_t reorder_objects;
atomic_t refcnt;
unsigned int max_seq_nr;
struct {
cpumask_var_t pcpu;
cpumask_var_t cbcpu;
} cpumask;
spinlock_t lock ____cacheline_aligned;
unsigned int processed;
struct timer_list timer;
atomic_t seq_nr;
atomic_t reorder_objects;
atomic_t refcnt;
unsigned int max_seq_nr;
struct padata_cpumask cpumask;
spinlock_t lock ____cacheline_aligned;
unsigned int processed;
struct timer_list timer;
};
/**
@ -139,8 +145,7 @@ struct parallel_data {
* @cpu_notifier: cpu hotplug notifier.
* @wq: The workqueue in use.
* @pd: The internal control structure.
* @cpumask: User supplied cpumask. Contains two cpumasks: pcpu and
* cbcpu for parallel and serial works respectivly.
* @cpumask: User supplied cpumasks for parallel and serial works.
* @cpumask_change_notifier: Notifiers chain for user-defined notify
* callbacks that will be called when either @pcpu or @cbcpu
* or both cpumasks change.
@ -152,10 +157,7 @@ struct padata_instance {
struct notifier_block cpu_notifier;
struct workqueue_struct *wq;
struct parallel_data *pd;
struct {
cpumask_var_t pcpu;
cpumask_var_t cbcpu;
} cpumask;
struct padata_cpumask cpumask;
struct blocking_notifier_head cpumask_change_notifier;
struct kobject kobj;
struct mutex lock;

3
kernel/padata.c
View File

@ -538,7 +538,8 @@ static void padata_replace(struct padata_instance *pinst,
if (notification_mask)
blocking_notifier_call_chain(&pinst->cpumask_change_notifier,
notification_mask, pinst);
notification_mask,
&pd_new->cpumask);
pinst->flags &= ~PADATA_RESET;
}