The patch titled
Subject: ipc/msg.c: use list_for_each_entry_[safe] for list traversing
has been added to the -mm tree. Its filename is
ipc-msgc-use-list_for_each_entry_-for-list-traversing.patch
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------------------------------------------------------
From: Nikola Pajkovsky <npajkovs@xxxxxxxxxx>
Subject: ipc/msg.c: use list_for_each_entry_[safe] for list traversing
The ipc/msg.c code does its list operations by hand and it open-codes the
accesses, instead of using for_each_entry_[safe].
Signed-off-by: Nikola Pajkovsky <npajkovs@xxxxxxxxxx>
Cc: Stanislav Kinsbursky <skinsbursky@xxxxxxxxxxxxx>
Cc: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
Cc: Peter Hurley <peter@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
ipc/msg.c | 35 ++++++++---------------------------
1 file changed, 8 insertions(+), 27 deletions(-)
diff -puN ipc/msg.c~ipc-msgc-use-list_for_each_entry_-for-list-traversing ipc/msg.c
--- a/ipc/msg.c~ipc-msgc-use-list_for_each_entry_-for-list-traversing
+++ a/ipc/msg.c
@@ -238,14 +238,9 @@ static inline void ss_del(struct msg_sen
static void ss_wakeup(struct list_head *h, int kill)
{
- struct list_head *tmp;
+ struct msg_sender *mss, *t;
- tmp = h->next;
- while (tmp != h) {
- struct msg_sender *mss;
-
- mss = list_entry(tmp, struct msg_sender, list);
- tmp = tmp->next;
+ list_for_each_entry_safe(mss, t, h, list) {
if (kill)
mss->list.next = NULL;
wake_up_process(mss->tsk);
@@ -254,14 +249,9 @@ static void ss_wakeup(struct list_head *
static void expunge_all(struct msg_queue *msq, int res)
{
- struct list_head *tmp;
-
- tmp = msq->q_receivers.next;
- while (tmp != &msq->q_receivers) {
- struct msg_receiver *msr;
+ struct msg_receiver *msr, *t;
- msr = list_entry(tmp, struct msg_receiver, r_list);
- tmp = tmp->next;
+ list_for_each_entry_safe(msr, t, &msq->q_receivers, r_list) {
msr->r_msg = NULL;
wake_up_process(msr->r_tsk);
smp_mb();
@@ -279,7 +269,7 @@ static void expunge_all(struct msg_queue
*/
static void freeque(struct ipc_namespace *ns, struct kern_ipc_perm *ipcp)
{
- struct list_head *tmp;
+ struct msg_msg *msg, *t;
struct msg_queue *msq = container_of(ipcp, struct msg_queue, q_perm);
expunge_all(msq, -EIDRM);
@@ -287,11 +277,7 @@ static void freeque(struct ipc_namespace
msg_rmid(ns, msq);
msg_unlock(msq);
- tmp = msq->q_messages.next;
- while (tmp != &msq->q_messages) {
- struct msg_msg *msg = list_entry(tmp, struct msg_msg, m_list);
-
- tmp = tmp->next;
+ list_for_each_entry_safe(msg, t, &msq->q_messages, m_list) {
atomic_dec(&ns->msg_hdrs);
free_msg(msg);
}
@@ -604,14 +590,9 @@ static int testmsg(struct msg_msg *msg,
static inline int pipelined_send(struct msg_queue *msq, struct msg_msg *msg)
{
- struct list_head *tmp;
-
- tmp = msq->q_receivers.next;
- while (tmp != &msq->q_receivers) {
- struct msg_receiver *msr;
+ struct msg_receiver *msr, *t;
- msr = list_entry(tmp, struct msg_receiver, r_list);
- tmp = tmp->next;
+ list_for_each_entry_safe(msr, t, &msq->q_receivers, r_list) {
if (testmsg(msg, msr->r_msgtype, msr->r_mode) &&
!security_msg_queue_msgrcv(msq, msg, msr->r_tsk,
msr->r_msgtype, msr->r_mode)) {
_
Patches currently in -mm which might be from npajkovs@xxxxxxxxxx are
ipc-msgc-use-list_for_each_entry_-for-list-traversing.patch
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