staging: lustre: obdclass: Use list_for_each_entry_safe

Doubly linked lists which are  iterated  using list_empty
and list_entry macros have been replaced with list_for_each_entry_safe
macro.
This makes the iteration simpler and more readable.

This patch replaces the while loop containing list_empty and list_entry
with list_for_each_entry_safe.

This was done with Coccinelle.

@@
expression E1;
identifier I1, I2;
type T;
iterator name list_for_each_entry_safe;
@@

T *I1;
+ T *tmp;
...
- while (list_empty(&E1) == 0)
+ list_for_each_entry_safe (I1, tmp, &E1, I2)
{
...when != T *I1;
- I1 = list_entry(E1.next, T, I2);
...
}

Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/lustre/lustre/obdclass/lustre_peer.c b/drivers/staging/lustre/lustre/obdclass/lustre_peer.c
index 5c38c83d6752db874612f0756be1d33d7829e442..5f812460b3eaccbd2a9f3aaa8c0b4b12fae33f37 100644 (file)
--- a/drivers/staging/lustre/lustre/obdclass/lustre_peer.c
+++ b/drivers/staging/lustre/lustre/obdclass/lustre_peer.c
@@ -150,6 +150,7 @@ int class_del_uuid(const char *uuid)
 {
        LIST_HEAD(deathrow);
        struct uuid_nid_data *data;
+       struct uuid_nid_data *temp;
 
        spin_lock(&g_uuid_lock);
        if (uuid) {
@@ -171,9 +172,7 @@ int class_del_uuid(const char *uuid)
                return -EINVAL;
        }
 
-       while (!list_empty(&deathrow)) {
-               data = list_entry(deathrow.next, struct uuid_nid_data,
-                                 un_list);
+       list_for_each_entry_safe(data, temp, &deathrow, un_list) {
                list_del(&data->un_list);
 
                CDEBUG(D_INFO, "del uuid %s %s/%d\n",