[PATCH 1/3] async: simplify lowest_in_progress()

[Lai Jiangshan <laijs@cn.fujitsu.com>]

The code in lowest_in_progress() are duplicated in two branches,
simplify them.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Arjan van de Ven <arjan@linux.intel.com>
---
 kernel/async.c |   20 ++++++++------------
 1 files changed, 8 insertions(+), 12 deletions(-)

diff --git a/kernel/async.c b/kernel/async.c
index 8ddee2c..ef66b2f 100644
--- a/kernel/async.c
+++ b/kernel/async.c
@@ -84,24 +84,20 @@ static atomic_t entry_count;
 
 static async_cookie_t lowest_in_progress(struct async_domain *domain)
 {
-	struct async_entry *first = NULL;
+	struct list_head *pending;
 	async_cookie_t ret = ASYNC_COOKIE_MAX;
 	unsigned long flags;
 
 	spin_lock_irqsave(&async_lock, flags);
 
-	if (domain) {
-		if (!list_empty(&domain->pending))
-			first = list_first_entry(&domain->pending,
-					struct async_entry, domain_list);
-	} else {
-		if (!list_empty(&async_global_pending))
-			first = list_first_entry(&async_global_pending,
-					struct async_entry, global_list);
-	}
+	if (domain)
+		pending = &domain->pending;
+	else
+		pending = &async_global_pending;
 
-	if (first)
-		ret = first->cookie;
+	if (!list_empty(pending))
+		ret = list_first_entry(pending, struct async_entry,
+				domain_list)->cookie;
 
 	spin_unlock_irqrestore(&async_lock, flags);
 	return ret;
-- 
1.7.4.4