dm: table use list_for_each
This patch is some minor janitorish cleanup, using some macros
from linux/list.h (already #included via dm.h) to improve
readability.
Signed-off-by: Paul Jimenez <pj@place.org>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 47818d8..d2eb3c5 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -287,9 +287,8 @@
{
struct list_head *tmp, *next;
- for (tmp = devices->next; tmp != devices; tmp = next) {
+ list_for_each_safe(tmp, next, devices) {
struct dm_dev *dd = list_entry(tmp, struct dm_dev, list);
- next = tmp->next;
kfree(dd);
}
}
@@ -993,12 +992,11 @@
int dm_table_any_congested(struct dm_table *t, int bdi_bits)
{
- struct list_head *d, *devices;
+ struct dm_dev *dd;
+ struct list_head *devices = dm_table_get_devices(t);
int r = 0;
- devices = dm_table_get_devices(t);
- for (d = devices->next; d != devices; d = d->next) {
- struct dm_dev *dd = list_entry(d, struct dm_dev, list);
+ list_for_each_entry(dd, devices, list) {
struct request_queue *q = bdev_get_queue(dd->bdev);
r |= bdi_congested(&q->backing_dev_info, bdi_bits);
}
@@ -1008,10 +1006,10 @@
void dm_table_unplug_all(struct dm_table *t)
{
- struct list_head *d, *devices = dm_table_get_devices(t);
+ struct dm_dev *dd;
+ struct list_head *devices = dm_table_get_devices(t);
- for (d = devices->next; d != devices; d = d->next) {
- struct dm_dev *dd = list_entry(d, struct dm_dev, list);
+ list_for_each_entry(dd, devices, list) {
struct request_queue *q = bdev_get_queue(dd->bdev);
blk_unplug(q);
