vfs: convert fs_supers to hlist
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/super.c b/fs/super.c
index 66a12f9..bab11ba 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -136,7 +136,7 @@
INIT_LIST_HEAD(&s->s_files);
#endif
s->s_bdi = &default_backing_dev_info;
- INIT_LIST_HEAD(&s->s_instances);
+ INIT_HLIST_NODE(&s->s_instances);
INIT_HLIST_BL_HEAD(&s->s_anon);
INIT_LIST_HEAD(&s->s_inodes);
INIT_LIST_HEAD(&s->s_dentry_lru);
@@ -328,7 +328,7 @@
bool grab_super_passive(struct super_block *sb)
{
spin_lock(&sb_lock);
- if (list_empty(&sb->s_instances)) {
+ if (hlist_unhashed(&sb->s_instances)) {
spin_unlock(&sb_lock);
return false;
}
@@ -400,7 +400,7 @@
}
spin_lock(&sb_lock);
/* should be initialized for __put_super_and_need_restart() */
- list_del_init(&sb->s_instances);
+ hlist_del_init(&sb->s_instances);
spin_unlock(&sb_lock);
up_write(&sb->s_umount);
}
@@ -420,13 +420,14 @@
void *data)
{
struct super_block *s = NULL;
+ struct hlist_node *node;
struct super_block *old;
int err;
retry:
spin_lock(&sb_lock);
if (test) {
- list_for_each_entry(old, &type->fs_supers, s_instances) {
+ hlist_for_each_entry(old, node, &type->fs_supers, s_instances) {
if (!test(old, data))
continue;
if (!grab_super(old))
@@ -462,7 +463,7 @@
s->s_type = type;
strlcpy(s->s_id, type->name, sizeof(s->s_id));
list_add_tail(&s->s_list, &super_blocks);
- list_add(&s->s_instances, &type->fs_supers);
+ hlist_add_head(&s->s_instances, &type->fs_supers);
spin_unlock(&sb_lock);
get_filesystem(type);
register_shrinker(&s->s_shrink);
@@ -497,7 +498,7 @@
spin_lock(&sb_lock);
list_for_each_entry(sb, &super_blocks, s_list) {
- if (list_empty(&sb->s_instances))
+ if (hlist_unhashed(&sb->s_instances))
continue;
if (sb->s_op->write_super && sb->s_dirt) {
sb->s_count++;
@@ -533,7 +534,7 @@
spin_lock(&sb_lock);
list_for_each_entry(sb, &super_blocks, s_list) {
- if (list_empty(&sb->s_instances))
+ if (hlist_unhashed(&sb->s_instances))
continue;
sb->s_count++;
spin_unlock(&sb_lock);
@@ -566,9 +567,10 @@
void (*f)(struct super_block *, void *), void *arg)
{
struct super_block *sb, *p = NULL;
+ struct hlist_node *node;
spin_lock(&sb_lock);
- list_for_each_entry(sb, &type->fs_supers, s_instances) {
+ hlist_for_each_entry(sb, node, &type->fs_supers, s_instances) {
sb->s_count++;
spin_unlock(&sb_lock);
@@ -607,7 +609,7 @@
spin_lock(&sb_lock);
rescan:
list_for_each_entry(sb, &super_blocks, s_list) {
- if (list_empty(&sb->s_instances))
+ if (hlist_unhashed(&sb->s_instances))
continue;
if (sb->s_bdev == bdev) {
sb->s_count++;
@@ -647,7 +649,7 @@
restart:
spin_lock(&sb_lock);
list_for_each_entry(sb, &super_blocks, s_list) {
- if (list_empty(&sb->s_instances))
+ if (hlist_unhashed(&sb->s_instances))
continue;
if (sb->s_bdev == bdev) {
if (grab_super(sb)) /* drops sb_lock */
@@ -667,7 +669,7 @@
spin_lock(&sb_lock);
rescan:
list_for_each_entry(sb, &super_blocks, s_list) {
- if (list_empty(&sb->s_instances))
+ if (hlist_unhashed(&sb->s_instances))
continue;
if (sb->s_dev == dev) {
sb->s_count++;
@@ -756,7 +758,7 @@
spin_lock(&sb_lock);
list_for_each_entry(sb, &super_blocks, s_list) {
- if (list_empty(&sb->s_instances))
+ if (hlist_unhashed(&sb->s_instances))
continue;
sb->s_count++;
spin_unlock(&sb_lock);