vfs: switch i_dentry/d_alias to hlist
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/dcache.c b/fs/dcache.c
index 44acb5b..015586f 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -218,7 +218,7 @@
{
struct dentry *dentry = container_of(head, struct dentry, d_u.d_rcu);
- WARN_ON(!list_empty(&dentry->d_alias));
+ WARN_ON(!hlist_unhashed(&dentry->d_alias));
if (dname_external(dentry))
kfree(dentry->d_name.name);
kmem_cache_free(dentry_cache, dentry);
@@ -267,7 +267,7 @@
struct inode *inode = dentry->d_inode;
if (inode) {
dentry->d_inode = NULL;
- list_del_init(&dentry->d_alias);
+ hlist_del_init(&dentry->d_alias);
spin_unlock(&dentry->d_lock);
spin_unlock(&inode->i_lock);
if (!inode->i_nlink)
@@ -291,7 +291,7 @@
{
struct inode *inode = dentry->d_inode;
dentry->d_inode = NULL;
- list_del_init(&dentry->d_alias);
+ hlist_del_init(&dentry->d_alias);
dentry_rcuwalk_barrier(dentry);
spin_unlock(&dentry->d_lock);
spin_unlock(&inode->i_lock);
@@ -699,10 +699,11 @@
static struct dentry *__d_find_alias(struct inode *inode, int want_discon)
{
struct dentry *alias, *discon_alias;
+ struct hlist_node *p;
again:
discon_alias = NULL;
- list_for_each_entry(alias, &inode->i_dentry, d_alias) {
+ hlist_for_each_entry(alias, p, &inode->i_dentry, d_alias) {
spin_lock(&alias->d_lock);
if (S_ISDIR(inode->i_mode) || !d_unhashed(alias)) {
if (IS_ROOT(alias) &&
@@ -737,7 +738,7 @@
{
struct dentry *de = NULL;
- if (!list_empty(&inode->i_dentry)) {
+ if (!hlist_empty(&inode->i_dentry)) {
spin_lock(&inode->i_lock);
de = __d_find_alias(inode, 0);
spin_unlock(&inode->i_lock);
@@ -753,9 +754,10 @@
void d_prune_aliases(struct inode *inode)
{
struct dentry *dentry;
+ struct hlist_node *p;
restart:
spin_lock(&inode->i_lock);
- list_for_each_entry(dentry, &inode->i_dentry, d_alias) {
+ hlist_for_each_entry(dentry, p, &inode->i_dentry, d_alias) {
spin_lock(&dentry->d_lock);
if (!dentry->d_count) {
__dget_dlock(dentry);
@@ -977,7 +979,7 @@
inode = dentry->d_inode;
if (inode) {
dentry->d_inode = NULL;
- list_del_init(&dentry->d_alias);
+ hlist_del_init(&dentry->d_alias);
if (dentry->d_op && dentry->d_op->d_iput)
dentry->d_op->d_iput(dentry, inode);
else
@@ -1312,7 +1314,7 @@
INIT_HLIST_BL_NODE(&dentry->d_hash);
INIT_LIST_HEAD(&dentry->d_lru);
INIT_LIST_HEAD(&dentry->d_subdirs);
- INIT_LIST_HEAD(&dentry->d_alias);
+ INIT_HLIST_NODE(&dentry->d_alias);
INIT_LIST_HEAD(&dentry->d_u.d_child);
d_set_d_op(dentry, dentry->d_sb->s_d_op);
@@ -1400,7 +1402,7 @@
if (inode) {
if (unlikely(IS_AUTOMOUNT(inode)))
dentry->d_flags |= DCACHE_NEED_AUTOMOUNT;
- list_add(&dentry->d_alias, &inode->i_dentry);
+ hlist_add_head(&dentry->d_alias, &inode->i_dentry);
}
dentry->d_inode = inode;
dentry_rcuwalk_barrier(dentry);
@@ -1425,7 +1427,7 @@
void d_instantiate(struct dentry *entry, struct inode * inode)
{
- BUG_ON(!list_empty(&entry->d_alias));
+ BUG_ON(!hlist_unhashed(&entry->d_alias));
if (inode)
spin_lock(&inode->i_lock);
__d_instantiate(entry, inode);
@@ -1458,13 +1460,14 @@
int len = entry->d_name.len;
const char *name = entry->d_name.name;
unsigned int hash = entry->d_name.hash;
+ struct hlist_node *p;
if (!inode) {
__d_instantiate(entry, NULL);
return NULL;
}
- list_for_each_entry(alias, &inode->i_dentry, d_alias) {
+ hlist_for_each_entry(alias, p, &inode->i_dentry, d_alias) {
/*
* Don't need alias->d_lock here, because aliases with
* d_parent == entry->d_parent are not subject to name or
@@ -1490,7 +1493,7 @@
{
struct dentry *result;
- BUG_ON(!list_empty(&entry->d_alias));
+ BUG_ON(!hlist_unhashed(&entry->d_alias));
if (inode)
spin_lock(&inode->i_lock);
@@ -1531,9 +1534,9 @@
{
struct dentry *alias;
- if (list_empty(&inode->i_dentry))
+ if (hlist_empty(&inode->i_dentry))
return NULL;
- alias = list_first_entry(&inode->i_dentry, struct dentry, d_alias);
+ alias = hlist_entry(inode->i_dentry.first, struct dentry, d_alias);
__dget(alias);
return alias;
}
@@ -1607,7 +1610,7 @@
spin_lock(&tmp->d_lock);
tmp->d_inode = inode;
tmp->d_flags |= DCACHE_DISCONNECTED;
- list_add(&tmp->d_alias, &inode->i_dentry);
+ hlist_add_head(&tmp->d_alias, &inode->i_dentry);
hlist_bl_lock(&tmp->d_sb->s_anon);
hlist_bl_add_head(&tmp->d_hash, &tmp->d_sb->s_anon);
hlist_bl_unlock(&tmp->d_sb->s_anon);