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-rw-r--r--include/linux/padata.h55
1 files changed, 55 insertions, 0 deletions
diff --git a/include/linux/padata.h b/include/linux/padata.h
index 51611da9c49..8d8406246ee 100644
--- a/include/linux/padata.h
+++ b/include/linux/padata.h
@@ -24,7 +24,19 @@
#include <linux/workqueue.h>
#include <linux/spinlock.h>
#include <linux/list.h>
+#include <linux/timer.h>
+/**
+ * struct padata_priv - Embedded to the users data structure.
+ *
+ * @list: List entry, to attach to the padata lists.
+ * @pd: Pointer to the internal control structure.
+ * @cb_cpu: Callback cpu for serializatioon.
+ * @seq_nr: Sequence number of the parallelized data object.
+ * @info: Used to pass information from the parallel to the serial function.
+ * @parallel: Parallel execution function.
+ * @serial: Serial complete function.
+ */
struct padata_priv {
struct list_head list;
struct parallel_data *pd;
@@ -35,11 +47,29 @@ struct padata_priv {
void (*serial)(struct padata_priv *padata);
};
+/**
+ * struct padata_list
+ *
+ * @list: List head.
+ * @lock: List lock.
+ */
struct padata_list {
struct list_head list;
spinlock_t lock;
};
+/**
+ * struct padata_queue - The percpu padata queues.
+ *
+ * @parallel: List to wait for parallelization.
+ * @reorder: List to wait for reordering after parallel processing.
+ * @serial: List to wait for serialization after reordering.
+ * @pwork: work struct for parallelization.
+ * @swork: work struct for serialization.
+ * @pd: Backpointer to the internal control structure.
+ * @num_obj: Number of objects that are processed by this cpu.
+ * @cpu_index: Index of the cpu.
+ */
struct padata_queue {
struct padata_list parallel;
struct padata_list reorder;
@@ -51,6 +81,20 @@ struct padata_queue {
int cpu_index;
};
+/**
+ * struct parallel_data - Internal control structure, covers everything
+ * that depends on the cpumask in use.
+ *
+ * @pinst: padata instance.
+ * @queue: percpu padata queues.
+ * @seq_nr: The sequence number that will be attached to the next object.
+ * @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: cpumask in use.
+ * @lock: Reorder lock.
+ * @timer: Reorder timer.
+ */
struct parallel_data {
struct padata_instance *pinst;
struct padata_queue *queue;
@@ -60,8 +104,19 @@ struct parallel_data {
unsigned int max_seq_nr;
cpumask_var_t cpumask;
spinlock_t lock;
+ struct timer_list timer;
};
+/**
+ * struct padata_instance - The overall control structure.
+ *
+ * @cpu_notifier: cpu hotplug notifier.
+ * @wq: The workqueue in use.
+ * @pd: The internal control structure.
+ * @cpumask: User supplied cpumask.
+ * @lock: padata instance lock.
+ * @flags: padata flags.
+ */
struct padata_instance {
struct notifier_block cpu_notifier;
struct workqueue_struct *wq;