Mar 11 2016

staging: lustre: lnet: router: Use list_for_each_entry_safe 

Author: Bhaktipriya Shridhar <bhaktipriya96@gmail.com>

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 
Signed-off-by: Greg Kroah-Hartman 

---
 drivers/staging/lustre/lnet/lnet/router.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
 
diff --git a/drivers/staging/lustre/lnet/lnet/router.c b/drivers/staging/lustre/lnet/lnet/router.c
index 6a44601..61459cf 100644
--- 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);
 	}

qlambert