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-rw-r--r--fs/dcache.c45
1 files changed, 21 insertions, 24 deletions
diff --git a/fs/dcache.c b/fs/dcache.c
index 129a357..7108c15 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -99,12 +99,9 @@ static struct kmem_cache *dentry_cache __read_mostly;
static unsigned int d_hash_mask __read_mostly;
static unsigned int d_hash_shift __read_mostly;
-struct dcache_hash_bucket {
- struct hlist_bl_head head;
-};
-static struct dcache_hash_bucket *dentry_hashtable __read_mostly;
+static struct hlist_bl_head *dentry_hashtable __read_mostly;
-static inline struct dcache_hash_bucket *d_hash(struct dentry *parent,
+static inline struct hlist_bl_head *d_hash(struct dentry *parent,
unsigned long hash)
{
hash += ((unsigned long) parent ^ GOLDEN_RATIO_PRIME) / L1_CACHE_BYTES;
@@ -112,14 +109,14 @@ static inline struct dcache_hash_bucket *d_hash(struct dentry *parent,
return dentry_hashtable + (hash & D_HASHMASK);
}
-static inline void spin_lock_bucket(struct dcache_hash_bucket *b)
+static inline void spin_lock_bucket(struct hlist_bl_head *b)
{
- bit_spin_lock(0, (unsigned long *)&b->head.first);
+ bit_spin_lock(0, (unsigned long *)&b->first);
}
-static inline void spin_unlock_bucket(struct dcache_hash_bucket *b)
+static inline void spin_unlock_bucket(struct hlist_bl_head *b)
{
- __bit_spin_unlock(0, (unsigned long *)&b->head.first);
+ __bit_spin_unlock(0, (unsigned long *)&b->first);
}
/* Statistics gathering. */
@@ -331,15 +328,15 @@ static struct dentry *d_kill(struct dentry *dentry, struct dentry *parent)
void __d_drop(struct dentry *dentry)
{
if (!(dentry->d_flags & DCACHE_UNHASHED)) {
+ struct hlist_bl_head *b;
if (unlikely(dentry->d_flags & DCACHE_DISCONNECTED)) {
- bit_spin_lock(0,
- (unsigned long *)&dentry->d_sb->s_anon.first);
+ b = &dentry->d_sb->s_anon;
+ spin_lock_bucket(b);
dentry->d_flags |= DCACHE_UNHASHED;
hlist_bl_del_init(&dentry->d_hash);
- __bit_spin_unlock(0,
- (unsigned long *)&dentry->d_sb->s_anon.first);
+ spin_unlock_bucket(b);
} else {
- struct dcache_hash_bucket *b;
+ struct hlist_bl_head *b;
b = d_hash(dentry->d_parent, dentry->d_name.hash);
spin_lock_bucket(b);
/*
@@ -1789,7 +1786,7 @@ struct dentry *__d_lookup_rcu(struct dentry *parent, struct qstr *name,
unsigned int len = name->len;
unsigned int hash = name->hash;
const unsigned char *str = name->name;
- struct dcache_hash_bucket *b = d_hash(parent, hash);
+ struct hlist_bl_head *b = d_hash(parent, hash);
struct hlist_bl_node *node;
struct dentry *dentry;
@@ -1813,7 +1810,7 @@ struct dentry *__d_lookup_rcu(struct dentry *parent, struct qstr *name,
*
* See Documentation/filesystems/path-lookup.txt for more details.
*/
- hlist_bl_for_each_entry_rcu(dentry, node, &b->head, d_hash) {
+ hlist_bl_for_each_entry_rcu(dentry, node, b, d_hash) {
struct inode *i;
const char *tname;
int tlen;
@@ -1908,7 +1905,7 @@ struct dentry *__d_lookup(struct dentry *parent, struct qstr *name)
unsigned int len = name->len;
unsigned int hash = name->hash;
const unsigned char *str = name->name;
- struct dcache_hash_bucket *b = d_hash(parent, hash);
+ struct hlist_bl_head *b = d_hash(parent, hash);
struct hlist_bl_node *node;
struct dentry *found = NULL;
struct dentry *dentry;
@@ -1935,7 +1932,7 @@ struct dentry *__d_lookup(struct dentry *parent, struct qstr *name)
*/
rcu_read_lock();
- hlist_bl_for_each_entry_rcu(dentry, node, &b->head, d_hash) {
+ hlist_bl_for_each_entry_rcu(dentry, node, b, d_hash) {
const char *tname;
int tlen;
@@ -2086,12 +2083,12 @@ again:
}
EXPORT_SYMBOL(d_delete);
-static void __d_rehash(struct dentry * entry, struct dcache_hash_bucket *b)
+static void __d_rehash(struct dentry * entry, struct hlist_bl_head *b)
{
BUG_ON(!d_unhashed(entry));
spin_lock_bucket(b);
entry->d_flags &= ~DCACHE_UNHASHED;
- hlist_bl_add_head_rcu(&entry->d_hash, &b->head);
+ hlist_bl_add_head_rcu(&entry->d_hash, b);
spin_unlock_bucket(b);
}
@@ -3025,7 +3022,7 @@ static void __init dcache_init_early(void)
dentry_hashtable =
alloc_large_system_hash("Dentry cache",
- sizeof(struct dcache_hash_bucket),
+ sizeof(struct hlist_bl_head),
dhash_entries,
13,
HASH_EARLY,
@@ -3034,7 +3031,7 @@ static void __init dcache_init_early(void)
0);
for (loop = 0; loop < (1 << d_hash_shift); loop++)
- INIT_HLIST_BL_HEAD(&dentry_hashtable[loop].head);
+ INIT_HLIST_BL_HEAD(dentry_hashtable + loop);
}
static void __init dcache_init(void)
@@ -3057,7 +3054,7 @@ static void __init dcache_init(void)
dentry_hashtable =
alloc_large_system_hash("Dentry cache",
- sizeof(struct dcache_hash_bucket),
+ sizeof(struct hlist_bl_head),
dhash_entries,
13,
0,
@@ -3066,7 +3063,7 @@ static void __init dcache_init(void)
0);
for (loop = 0; loop < (1 << d_hash_shift); loop++)
- INIT_HLIST_BL_HEAD(&dentry_hashtable[loop].head);
+ INIT_HLIST_BL_HEAD(dentry_hashtable + loop);
}
/* SLAB cache for __getname() consumers */
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