block: rename the return of two functions

If we rename the return of alloc_io_context() and get_io_context() from
"ret" to "ioc" the code get's (a bit) more readable and (a lot) more
grepable.
Signed-off-by: NPaul Bolle <pebolle@tiscali.nl>
Signed-off-by: NJens Axboe <jaxboe@fusionio.com>

block/blk-ioc.c

@@ -82,26 +82,26 @@ void exit_io_context(struct task_struct *task)
 
 struct io_context *alloc_io_context(gfp_t gfp_flags, int node)
 {
-	struct io_context *ret;
+	struct io_context *ioc;
 
-	ret = kmem_cache_alloc_node(iocontext_cachep, gfp_flags, node);
-	if (ret) {
-		atomic_long_set(&ret->refcount, 1);
-		atomic_set(&ret->nr_tasks, 1);
-		spin_lock_init(&ret->lock);
-		ret->ioprio_changed = 0;
-		ret->ioprio = 0;
-		ret->last_waited = 0; /* doesn't matter... */
-		ret->nr_batch_requests = 0; /* because this is 0 */
-		INIT_RADIX_TREE(&ret->radix_root, GFP_ATOMIC | __GFP_HIGH);
-		INIT_HLIST_HEAD(&ret->cic_list);
-		ret->ioc_data = NULL;
+	ioc = kmem_cache_alloc_node(iocontext_cachep, gfp_flags, node);
+	if (ioc) {
+		atomic_long_set(&ioc->refcount, 1);
+		atomic_set(&ioc->nr_tasks, 1);
+		spin_lock_init(&ioc->lock);
+		ioc->ioprio_changed = 0;
+		ioc->ioprio = 0;
+		ioc->last_waited = 0; /* doesn't matter... */
+		ioc->nr_batch_requests = 0; /* because this is 0 */
+		INIT_RADIX_TREE(&ioc->radix_root, GFP_ATOMIC | __GFP_HIGH);
+		INIT_HLIST_HEAD(&ioc->cic_list);
+		ioc->ioc_data = NULL;
 #if defined(CONFIG_BLK_CGROUP) || defined(CONFIG_BLK_CGROUP_MODULE)
-		ret->cgroup_changed = 0;
+		ioc->cgroup_changed = 0;
 #endif
 	}
 
-	return ret;
+	return ioc;
 }
 
 /*
@@ -139,19 +139,19 @@ struct io_context *current_io_context(gfp_t gfp_flags, int node)
  */
 struct io_context *get_io_context(gfp_t gfp_flags, int node)
 {
-	struct io_context *ret = NULL;
+	struct io_context *ioc = NULL;
 
 	/*
 	 * Check for unlikely race with exiting task. ioc ref count is
 	 * zero when ioc is being detached.
 	 */
 	do {
-		ret = current_io_context(gfp_flags, node);
-		if (unlikely(!ret))
+		ioc = current_io_context(gfp_flags, node);
+		if (unlikely(!ioc))
 			break;
-	} while (!atomic_long_inc_not_zero(&ret->refcount));
+	} while (!atomic_long_inc_not_zero(&ioc->refcount));
 
-	return ret;
+	return ioc;
 }
 EXPORT_SYMBOL(get_io_context);