[SCSI] libsas: export sas_alloc_task()
Now that isci has added a 3rd open coded user of this functionality just
share the libsas version.
Acked-by: Jack Wang <jack_wang@usish.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
diff --git a/drivers/scsi/libsas/sas_init.c b/drivers/scsi/libsas/sas_init.c
index 2dc5534..dd56ea8 100644
--- a/drivers/scsi/libsas/sas_init.c
+++ b/drivers/scsi/libsas/sas_init.c
@@ -37,7 +37,32 @@
#include "../scsi_sas_internal.h"
-struct kmem_cache *sas_task_cache;
+static struct kmem_cache *sas_task_cache;
+
+struct sas_task *sas_alloc_task(gfp_t flags)
+{
+ struct sas_task *task = kmem_cache_zalloc(sas_task_cache, flags);
+
+ if (task) {
+ INIT_LIST_HEAD(&task->list);
+ spin_lock_init(&task->task_state_lock);
+ task->task_state_flags = SAS_TASK_STATE_PENDING;
+ init_timer(&task->timer);
+ init_completion(&task->completion);
+ }
+
+ return task;
+}
+EXPORT_SYMBOL_GPL(sas_alloc_task);
+
+void sas_free_task(struct sas_task *task)
+{
+ if (task) {
+ BUG_ON(!list_empty(&task->list));
+ kmem_cache_free(sas_task_cache, task);
+ }
+}
+EXPORT_SYMBOL_GPL(sas_free_task);
/*------------ SAS addr hash -----------*/
void sas_hash_addr(u8 *hashed, const u8 *sas_addr)
@@ -293,8 +318,7 @@
static int __init sas_class_init(void)
{
- sas_task_cache = kmem_cache_create("sas_task", sizeof(struct sas_task),
- 0, SLAB_HWCACHE_ALIGN, NULL);
+ sas_task_cache = KMEM_CACHE(sas_task, SLAB_HWCACHE_ALIGN);
if (!sas_task_cache)
return -ENOMEM;