rbd: use list_for_each_entry() helper

Convert list_for_each() to list_for_each_entry() so that the tmp
list_head pointer and list_entry() call are no longer needed, which
can reduce a few lines of code. No functional changed.

Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 2328cc0..3de11f0 100644 (file)
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -7199,7 +7199,6 @@ static void rbd_dev_remove_parent(struct rbd_device *rbd_dev)
 static ssize_t do_rbd_remove(const char *buf, size_t count)
 {
        struct rbd_device *rbd_dev = NULL;
-       struct list_head *tmp;
        int dev_id;
        char opt_buf[6];
        bool force = false;
@@ -7226,8 +7225,7 @@ static ssize_t do_rbd_remove(const char *buf, size_t count)
 
        ret = -ENOENT;
        spin_lock(&rbd_dev_list_lock);
-       list_for_each(tmp, &rbd_dev_list) {
-               rbd_dev = list_entry(tmp, struct rbd_device, node);
+       list_for_each_entry(rbd_dev, &rbd_dev_list, node) {
                if (rbd_dev->dev_id == dev_id) {
                        ret = 0;
                        break;