linux-kernel - [PATCH 1/3] driver core: bus: use list_for_each

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Date:	Tue,  5 Jan 2016 23:03:37 +0800
From:	Geliang Tang <geliangtang@....com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	Geliang Tang <geliangtang@....com>, linux-kernel@...r.kernel.org
Subject: [PATCH 1/3] driver core: bus: use list_for_each_entry*

Use list_for_each_entry*() instead of list_for_each*() to simplify
the code.

Signed-off-by: Geliang Tang <geliangtang@....com>
---
 drivers/base/bus.c | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index 5005924..4bee6b0 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -1019,13 +1019,11 @@ static void device_insertion_sort_klist(struct device *a, struct list_head *list
 					int (*compare)(const struct device *a,
 							const struct device *b))
 {
-	struct list_head *pos;
 	struct klist_node *n;
 	struct device_private *dev_prv;
 	struct device *b;
 
-	list_for_each(pos, list) {
-		n = container_of(pos, struct klist_node, n_node);
+	list_for_each_entry(n, list, n_node) {
 		dev_prv = to_device_private_bus(n);
 		b = dev_prv->device;
 		if (compare(a, b) <= 0) {
@@ -1042,8 +1040,7 @@ void bus_sort_breadthfirst(struct bus_type *bus,
 					  const struct device *b))
 {
 	LIST_HEAD(sorted_devices);
-	struct list_head *pos, *tmp;
-	struct klist_node *n;
+	struct klist_node *n, *tmp;
 	struct device_private *dev_prv;
 	struct device *dev;
 	struct klist *device_klist;
@@ -1051,8 +1048,7 @@ void bus_sort_breadthfirst(struct bus_type *bus,
 	device_klist = bus_get_device_klist(bus);
 
 	spin_lock(&device_klist->k_lock);
-	list_for_each_safe(pos, tmp, &device_klist->k_list) {
-		n = container_of(pos, struct klist_node, n_node);
+	list_for_each_entry_safe(n, tmp, &device_klist->k_list, n_node) {
 		dev_prv = to_device_private_bus(n);
 		dev = dev_prv->device;
 		device_insertion_sort_klist(dev, &sorted_devices, compare);
-- 
2.5.0


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