hlist: drop the node parameter from iterators
I'm not sure why, but the hlist for each entry iterators were conceived
list_for_each_entry(pos, head, member)
The hlist ones were greedy and wanted an extra parameter:
hlist_for_each_entry(tpos, pos, head, member)
Why did they need an extra pos parameter? I'm not quite sure. Not only
they don't really need it, it also prevents the iterator from looking
exactly like the list iterator, which is unfortunate.
Besides the semantic patch, there was some manual work required:
- Fix up the actual hlist iterators in linux/list.h
- Fix up the declaration of other iterators based on the hlist ones.
- A very small amount of places were using the 'node' parameter, this
was modified to use 'obj->member' instead.
- Coccinelle didn't handle the hlist_for_each_entry_safe iterator
properly, so those had to be fixed up manually.
The semantic patch which is mostly the work of Peter Senna Tschudin is here:
@@
iterator name hlist_for_each_entry, hlist_for_each_entry_continue, hlist_for_each_entry_from, hlist_for_each_entry_rcu, hlist_for_each_entry_rcu_bh, hlist_for_each_entry_continue_rcu_bh, for_each_busy_worker, ax25_uid_for_each, ax25_for_each, inet_bind_bucket_for_each, sctp_for_each_hentry, sk_for_each, sk_for_each_rcu, sk_for_each_from, sk_for_each_safe, sk_for_each_bound, hlist_for_each_entry_safe, hlist_for_each_entry_continue_rcu, nr_neigh_for_each, nr_neigh_for_each_safe, nr_node_for_each, nr_node_for_each_safe, for_each_gfn_indirect_valid_sp, for_each_gfn_sp, for_each_host;
type T;
expression a,c,d,e;
identifier b;
statement S;
@@
-T b;
<+... when != b
(
hlist_for_each_entry(a,
- b,
c, d) S
|
hlist_for_each_entry_continue(a,
- b,
c) S
|
hlist_for_each_entry_from(a,
- b,
c) S
|
hlist_for_each_entry_rcu(a,
- b,
c, d) S
|
hlist_for_each_entry_rcu_bh(a,
- b,
c, d) S
|
hlist_for_each_entry_continue_rcu_bh(a,
- b,
c) S
|
for_each_busy_worker(a, c,
- b,
d) S
|
ax25_uid_for_each(a,
- b,
c) S
|
ax25_for_each(a,
- b,
c) S
|
inet_bind_bucket_for_each(a,
- b,
c) S
|
sctp_for_each_hentry(a,
- b,
c) S
|
sk_for_each(a,
- b,
c) S
|
sk_for_each_rcu(a,
- b,
c) S
|
sk_for_each_from
-(a, b)
+(a)
S
+ sk_for_each_from(a) S
|
sk_for_each_safe(a,
- b,
c, d) S
|
sk_for_each_bound(a,
- b,
c) S
|
hlist_for_each_entry_safe(a,
- b,
c, d, e) S
|
hlist_for_each_entry_continue_rcu(a,
- b,
c) S
|
nr_neigh_for_each(a,
- b,
c) S
|
nr_neigh_for_each_safe(a,
- b,
c, d) S
|
nr_node_for_each(a,
- b,
c) S
|
nr_node_for_each_safe(a,
- b,
c, d) S
|
- for_each_gfn_sp(a, c, d, b) S
+ for_each_gfn_sp(a, c, d) S
|
- for_each_gfn_indirect_valid_sp(a, c, d, b) S
+ for_each_gfn_indirect_valid_sp(a, c, d) S
|
for_each_host(a,
- b,
c) S
|
for_each_host_safe(a,
- b,
c, d) S
|
for_each_mesh_entry(a,
- b,
c, d) S
)
...+>
[akpm@linux-foundation.org: drop bogus change from net/ipv4/raw.c]
[akpm@linux-foundation.org: drop bogus hunk from net/ipv6/raw.c]
[akpm@linux-foundation.org: checkpatch fixes]
[akpm@linux-foundation.org: fix warnings]
[akpm@linux-foudnation.org: redo intrusive kvm changes]
Tested-by: Peter Senna Tschudin <peter.senna@gmail.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/net/sched/sch_cbq.c b/net/sched/sch_cbq.c
index 0e19948..13aa47a 100644
--- a/net/sched/sch_cbq.c
+++ b/net/sched/sch_cbq.c
@@ -1041,14 +1041,13 @@
static void cbq_normalize_quanta(struct cbq_sched_data *q, int prio)
{
struct cbq_class *cl;
- struct hlist_node *n;
unsigned int h;
if (q->quanta[prio] == 0)
return;
for (h = 0; h < q->clhash.hashsize; h++) {
- hlist_for_each_entry(cl, n, &q->clhash.hash[h], common.hnode) {
+ hlist_for_each_entry(cl, &q->clhash.hash[h], common.hnode) {
/* BUGGGG... Beware! This expression suffer of
* arithmetic overflows!
*/
@@ -1087,10 +1086,9 @@
continue;
for (h = 0; h < q->clhash.hashsize; h++) {
- struct hlist_node *n;
struct cbq_class *c;
- hlist_for_each_entry(c, n, &q->clhash.hash[h],
+ hlist_for_each_entry(c, &q->clhash.hash[h],
common.hnode) {
if (c->split == split && c->level < level &&
c->defmap & (1<<i)) {
@@ -1210,7 +1208,6 @@
{
struct cbq_sched_data *q = qdisc_priv(sch);
struct cbq_class *cl;
- struct hlist_node *n;
int prio;
unsigned int h;
@@ -1228,7 +1225,7 @@
q->active[prio] = NULL;
for (h = 0; h < q->clhash.hashsize; h++) {
- hlist_for_each_entry(cl, n, &q->clhash.hash[h], common.hnode) {
+ hlist_for_each_entry(cl, &q->clhash.hash[h], common.hnode) {
qdisc_reset(cl->q);
cl->next_alive = NULL;
@@ -1697,7 +1694,7 @@
static void cbq_destroy(struct Qdisc *sch)
{
struct cbq_sched_data *q = qdisc_priv(sch);
- struct hlist_node *n, *next;
+ struct hlist_node *next;
struct cbq_class *cl;
unsigned int h;
@@ -1710,11 +1707,11 @@
* be bound to classes which have been destroyed already. --TGR '04
*/
for (h = 0; h < q->clhash.hashsize; h++) {
- hlist_for_each_entry(cl, n, &q->clhash.hash[h], common.hnode)
+ hlist_for_each_entry(cl, &q->clhash.hash[h], common.hnode)
tcf_destroy_chain(&cl->filter_list);
}
for (h = 0; h < q->clhash.hashsize; h++) {
- hlist_for_each_entry_safe(cl, n, next, &q->clhash.hash[h],
+ hlist_for_each_entry_safe(cl, next, &q->clhash.hash[h],
common.hnode)
cbq_destroy_class(sch, cl);
}
@@ -2013,14 +2010,13 @@
{
struct cbq_sched_data *q = qdisc_priv(sch);
struct cbq_class *cl;
- struct hlist_node *n;
unsigned int h;
if (arg->stop)
return;
for (h = 0; h < q->clhash.hashsize; h++) {
- hlist_for_each_entry(cl, n, &q->clhash.hash[h], common.hnode) {
+ hlist_for_each_entry(cl, &q->clhash.hash[h], common.hnode) {
if (arg->count < arg->skip) {
arg->count++;
continue;