[PATCH 02/17] drbd: change list_for_each_safe to while(list_first_entry_or_null)

[Philipp Reisner]

From: Lars Ellenberg <lars.ellenb...@linbit.com>

Two instances of list_for_each_safe can drop their tmp element, they
really just peel off each element in turn from the start of the list.

Signed-off-by: Philipp Reisner <philipp.reis...@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenb...@linbit.com>

diff --git a/drivers/block/drbd/drbd_req.c b/drivers/block/drbd/drbd_req.c
index 5955ab8..85e05ee 100644
--- a/drivers/block/drbd/drbd_req.c
+++ b/drivers/block/drbd/drbd_req.c
@@ -1485,12 +1485,12 @@ static bool prepare_al_transaction_nonblock(struct 
drbd_device *device,
                                            struct list_head *pending,
                                            struct list_head *later)
 {
-       struct drbd_request *req, *tmp;
+       struct drbd_request *req;
        int wake = 0;
        int err;
 
        spin_lock_irq(&device->al_lock);
-       list_for_each_entry_safe(req, tmp, incoming, tl_requests) {
+       while ((req = list_first_entry_or_null(incoming, struct drbd_request, 
tl_requests))) {
                err = drbd_al_begin_io_nonblock(device, &req->i);
                if (err == -ENOBUFS)
                        break;
@@ -1509,9 +1509,9 @@ static bool prepare_al_transaction_nonblock(struct 
drbd_device *device,
 
 void send_and_submit_pending(struct drbd_device *device, struct list_head 
*pending)
 {
-       struct drbd_request *req, *tmp;
+       struct drbd_request *req;
 
-       list_for_each_entry_safe(req, tmp, pending, tl_requests) {
+       while ((req = list_first_entry_or_null(pending, struct drbd_request, 
tl_requests))) {
                req->rq_state |= RQ_IN_ACT_LOG;
                req->in_actlog_jif = jiffies;
                atomic_dec(&device->ap_actlog_cnt);
-- 
2.7.4