[PATCH 1/5] staging: lustre: Use list_for_each_entry_safe

[simran singhal]

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: simran singhal <singhalsimr...@gmail.com>
---
 drivers/staging/lustre/lustre/ptlrpc/service.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/lustre/lustre/ptlrpc/service.c 
b/drivers/staging/lustre/lustre/ptlrpc/service.c
index b8091c1..4e7dc1d 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/service.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/service.c
@@ -2314,6 +2314,7 @@ static void ptlrpc_svcpt_stop_threads(struct 
ptlrpc_service_part *svcpt)
 {
        struct l_wait_info lwi = { 0 };
        struct ptlrpc_thread *thread;
+       struct ptlrpc_thread *tmp;
        LIST_HEAD(zombie);
 
        CDEBUG(D_INFO, "Stopping threads for service %s\n",
@@ -2329,9 +2330,7 @@ static void ptlrpc_svcpt_stop_threads(struct 
ptlrpc_service_part *svcpt)
 
        wake_up_all(&svcpt->scp_waitq);
 
-       while (!list_empty(&svcpt->scp_threads)) {
-               thread = list_entry(svcpt->scp_threads.next,
-                                   struct ptlrpc_thread, t_link);
+       list_for_each_entry_safe(thread, tmp, &svcpt->scp_threads, t_link) {
                if (thread_is_stopped(thread)) {
                        list_del(&thread->t_link);
                        list_add(&thread->t_link, &zombie);
-- 
2.7.4