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/netlink/af_netlink.c b/net/netlink/af_netlink.c
index 8097b4f..1e3fd5b 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -248,11 +248,10 @@
struct nl_portid_hash *hash = &nl_table[protocol].hash;
struct hlist_head *head;
struct sock *sk;
- struct hlist_node *node;
read_lock(&nl_table_lock);
head = nl_portid_hashfn(hash, portid);
- sk_for_each(sk, node, head) {
+ sk_for_each(sk, head) {
if (net_eq(sock_net(sk), net) && (nlk_sk(sk)->portid == portid)) {
sock_hold(sk);
goto found;
@@ -312,9 +311,9 @@
for (i = 0; i <= omask; i++) {
struct sock *sk;
- struct hlist_node *node, *tmp;
+ struct hlist_node *tmp;
- sk_for_each_safe(sk, node, tmp, &otable[i])
+ sk_for_each_safe(sk, tmp, &otable[i])
__sk_add_node(sk, nl_portid_hashfn(hash, nlk_sk(sk)->portid));
}
@@ -344,7 +343,6 @@
netlink_update_listeners(struct sock *sk)
{
struct netlink_table *tbl = &nl_table[sk->sk_protocol];
- struct hlist_node *node;
unsigned long mask;
unsigned int i;
struct listeners *listeners;
@@ -355,7 +353,7 @@
for (i = 0; i < NLGRPLONGS(tbl->groups); i++) {
mask = 0;
- sk_for_each_bound(sk, node, &tbl->mc_list) {
+ sk_for_each_bound(sk, &tbl->mc_list) {
if (i < NLGRPLONGS(nlk_sk(sk)->ngroups))
mask |= nlk_sk(sk)->groups[i];
}
@@ -371,18 +369,17 @@
struct hlist_head *head;
int err = -EADDRINUSE;
struct sock *osk;
- struct hlist_node *node;
int len;
netlink_table_grab();
head = nl_portid_hashfn(hash, portid);
len = 0;
- sk_for_each(osk, node, head) {
+ sk_for_each(osk, head) {
if (net_eq(sock_net(osk), net) && (nlk_sk(osk)->portid == portid))
break;
len++;
}
- if (node)
+ if (osk)
goto err;
err = -EBUSY;
@@ -575,7 +572,6 @@
struct nl_portid_hash *hash = &nl_table[sk->sk_protocol].hash;
struct hlist_head *head;
struct sock *osk;
- struct hlist_node *node;
s32 portid = task_tgid_vnr(current);
int err;
static s32 rover = -4097;
@@ -584,7 +580,7 @@
cond_resched();
netlink_table_grab();
head = nl_portid_hashfn(hash, portid);
- sk_for_each(osk, node, head) {
+ sk_for_each(osk, head) {
if (!net_eq(sock_net(osk), net))
continue;
if (nlk_sk(osk)->portid == portid) {
@@ -1101,7 +1097,6 @@
{
struct net *net = sock_net(ssk);
struct netlink_broadcast_data info;
- struct hlist_node *node;
struct sock *sk;
skb = netlink_trim(skb, allocation);
@@ -1124,7 +1119,7 @@
netlink_lock_table();
- sk_for_each_bound(sk, node, &nl_table[ssk->sk_protocol].mc_list)
+ sk_for_each_bound(sk, &nl_table[ssk->sk_protocol].mc_list)
do_one_broadcast(sk, &info);
consume_skb(skb);
@@ -1200,7 +1195,6 @@
int netlink_set_err(struct sock *ssk, u32 portid, u32 group, int code)
{
struct netlink_set_err_data info;
- struct hlist_node *node;
struct sock *sk;
int ret = 0;
@@ -1212,7 +1206,7 @@
read_lock(&nl_table_lock);
- sk_for_each_bound(sk, node, &nl_table[ssk->sk_protocol].mc_list)
+ sk_for_each_bound(sk, &nl_table[ssk->sk_protocol].mc_list)
ret += do_one_set_err(sk, &info);
read_unlock(&nl_table_lock);
@@ -1676,10 +1670,9 @@
void __netlink_clear_multicast_users(struct sock *ksk, unsigned int group)
{
struct sock *sk;
- struct hlist_node *node;
struct netlink_table *tbl = &nl_table[ksk->sk_protocol];
- sk_for_each_bound(sk, node, &tbl->mc_list)
+ sk_for_each_bound(sk, &tbl->mc_list)
netlink_update_socket_mc(nlk_sk(sk), group, 0);
}
@@ -1974,14 +1967,13 @@
struct nl_seq_iter *iter = seq->private;
int i, j;
struct sock *s;
- struct hlist_node *node;
loff_t off = 0;
for (i = 0; i < MAX_LINKS; i++) {
struct nl_portid_hash *hash = &nl_table[i].hash;
for (j = 0; j <= hash->mask; j++) {
- sk_for_each(s, node, &hash->table[j]) {
+ sk_for_each(s, &hash->table[j]) {
if (sock_net(s) != seq_file_net(seq))
continue;
if (off == pos) {