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/batman-adv/vis.c b/net/batman-adv/vis.c
index 22d2785..c053244 100644
--- a/net/batman-adv/vis.c
+++ b/net/batman-adv/vis.c
@@ -97,7 +97,6 @@
{
struct batadv_hashtable *hash = bat_priv->vis.hash;
struct hlist_head *head;
- struct hlist_node *node;
struct batadv_vis_info *vis_info, *vis_info_tmp = NULL;
uint32_t index;
@@ -108,8 +107,8 @@
head = &hash->table[index];
rcu_read_lock();
- hlist_for_each_entry_rcu(vis_info, node, head, hash_entry) {
- if (!batadv_vis_info_cmp(node, data))
+ hlist_for_each_entry_rcu(vis_info, head, hash_entry) {
+ if (!batadv_vis_info_cmp(&vis_info->hash_entry, data))
continue;
vis_info_tmp = vis_info;
@@ -128,9 +127,8 @@
bool primary)
{
struct batadv_vis_if_list_entry *entry;
- struct hlist_node *pos;
- hlist_for_each_entry(entry, pos, if_list, list) {
+ hlist_for_each_entry(entry, if_list, list) {
if (batadv_compare_eth(entry->addr, interface))
return;
}
@@ -148,9 +146,8 @@
const struct hlist_head *if_list)
{
struct batadv_vis_if_list_entry *entry;
- struct hlist_node *pos;
- hlist_for_each_entry(entry, pos, if_list, list) {
+ hlist_for_each_entry(entry, if_list, list) {
if (entry->primary)
seq_printf(seq, "PRIMARY, ");
else
@@ -198,9 +195,8 @@
{
int i;
struct batadv_vis_if_list_entry *entry;
- struct hlist_node *pos;
- hlist_for_each_entry(entry, pos, list, list) {
+ hlist_for_each_entry(entry, list, list) {
seq_printf(seq, "%pM,", entry->addr);
for (i = 0; i < packet->entries; i++)
@@ -218,17 +214,16 @@
static void batadv_vis_seq_print_text_bucket(struct seq_file *seq,
const struct hlist_head *head)
{
- struct hlist_node *node;
struct batadv_vis_info *info;
struct batadv_vis_packet *packet;
uint8_t *entries_pos;
struct batadv_vis_info_entry *entries;
struct batadv_vis_if_list_entry *entry;
- struct hlist_node *pos, *n;
+ struct hlist_node *n;
HLIST_HEAD(vis_if_list);
- hlist_for_each_entry_rcu(info, node, head, hash_entry) {
+ hlist_for_each_entry_rcu(info, head, hash_entry) {
packet = (struct batadv_vis_packet *)info->skb_packet->data;
entries_pos = (uint8_t *)packet + sizeof(*packet);
entries = (struct batadv_vis_info_entry *)entries_pos;
@@ -240,7 +235,7 @@
batadv_vis_data_read_entries(seq, &vis_if_list, packet,
entries);
- hlist_for_each_entry_safe(entry, pos, n, &vis_if_list, list) {
+ hlist_for_each_entry_safe(entry, n, &vis_if_list, list) {
hlist_del(&entry->list);
kfree(entry);
}
@@ -519,7 +514,6 @@
{
struct batadv_hashtable *hash = bat_priv->orig_hash;
struct batadv_neigh_node *router;
- struct hlist_node *node;
struct hlist_head *head;
struct batadv_orig_node *orig_node;
struct batadv_vis_packet *packet;
@@ -532,7 +526,7 @@
head = &hash->table[i];
rcu_read_lock();
- hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) {
+ hlist_for_each_entry_rcu(orig_node, head, hash_entry) {
router = batadv_orig_node_get_router(orig_node);
if (!router)
continue;
@@ -571,7 +565,6 @@
static int batadv_generate_vis_packet(struct batadv_priv *bat_priv)
{
struct batadv_hashtable *hash = bat_priv->orig_hash;
- struct hlist_node *node;
struct hlist_head *head;
struct batadv_orig_node *orig_node;
struct batadv_neigh_node *router;
@@ -605,7 +598,7 @@
head = &hash->table[i];
rcu_read_lock();
- hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) {
+ hlist_for_each_entry_rcu(orig_node, head, hash_entry) {
router = batadv_orig_node_get_router(orig_node);
if (!router)
continue;
@@ -644,7 +637,7 @@
head = &hash->table[i];
rcu_read_lock();
- hlist_for_each_entry_rcu(tt_common_entry, node, head,
+ hlist_for_each_entry_rcu(tt_common_entry, head,
hash_entry) {
packet_pos = skb_put(info->skb_packet, sizeof(*entry));
entry = (struct batadv_vis_info_entry *)packet_pos;
@@ -673,14 +666,14 @@
{
uint32_t i;
struct batadv_hashtable *hash = bat_priv->vis.hash;
- struct hlist_node *node, *node_tmp;
+ struct hlist_node *node_tmp;
struct hlist_head *head;
struct batadv_vis_info *info;
for (i = 0; i < hash->size; i++) {
head = &hash->table[i];
- hlist_for_each_entry_safe(info, node, node_tmp,
+ hlist_for_each_entry_safe(info, node_tmp,
head, hash_entry) {
/* never purge own data. */
if (info == bat_priv->vis.my_info)
@@ -688,7 +681,7 @@
if (batadv_has_timed_out(info->first_seen,
BATADV_VIS_TIMEOUT)) {
- hlist_del(node);
+ hlist_del(&info->hash_entry);
batadv_send_list_del(info);
kref_put(&info->refcount, batadv_free_info);
}
@@ -700,7 +693,6 @@
struct batadv_vis_info *info)
{
struct batadv_hashtable *hash = bat_priv->orig_hash;
- struct hlist_node *node;
struct hlist_head *head;
struct batadv_orig_node *orig_node;
struct batadv_vis_packet *packet;
@@ -715,7 +707,7 @@
head = &hash->table[i];
rcu_read_lock();
- hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) {
+ hlist_for_each_entry_rcu(orig_node, head, hash_entry) {
/* if it's a vis server and reachable, send it. */
if (!(orig_node->flags & BATADV_VIS_SERVER))
continue;