staging: lustre: lnet: router: 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/lnet/lnet/router.c b/drivers/staging/lustre/lnet/lnet/router.c
index 6a446010eda80c5887048bb89d7b1c2102442f45..61459cf9d58fa7121099f6b9716a8be7416a6955 100644 (file)
--- a/drivers/staging/lustre/lnet/lnet/router.c
+++ b/drivers/staging/lustre/lnet/lnet/router.c
@@ -1352,6 +1352,7 @@ lnet_rtrpool_free_bufs(lnet_rtrbufpool_t *rbp, int cpt)
        int npages = rbp->rbp_npages;
        struct list_head tmp;
        lnet_rtrbuf_t *rb;
+       lnet_rtrbuf_t *temp;
 
        if (!rbp->rbp_nbuffers) /* not initialized or already freed */
                return;
@@ -1368,8 +1369,7 @@ lnet_rtrpool_free_bufs(lnet_rtrbufpool_t *rbp, int cpt)
        lnet_net_unlock(cpt);
 
        /* Free buffers on the free list. */
-       while (!list_empty(&tmp)) {
-               rb = list_entry(tmp.next, lnet_rtrbuf_t, rb_list);
+       list_for_each_entry_safe(rb, temp, &tmp, rb_list) {
                list_del(&rb->rb_list);
                lnet_destroy_rtrbuf(rb, npages);
        }