FAT: use hlist_head for fat_inode_hashtable (1/4)

diff -puN fs/fat/inode.c~fat_hlist-for-inodehash fs/fat/inode.c
@@ -58,15 +58,14 @@ static char fat_default_iocharset[] = CO
 #define FAT_HASH_BITS	8
 #define FAT_HASH_SIZE	(1UL << FAT_HASH_BITS)
 #define FAT_HASH_MASK	(FAT_HASH_SIZE-1)
-static struct list_head fat_inode_hashtable[FAT_HASH_SIZE];
+static struct hlist_head fat_inode_hashtable[FAT_HASH_SIZE];
 static spinlock_t fat_inode_lock = SPIN_LOCK_UNLOCKED;
 
 void fat_hash_init(void)
 {
 	int i;
-	for(i = 0; i < FAT_HASH_SIZE; i++) {
-		INIT_LIST_HEAD(&fat_inode_hashtable[i]);
-	}
+	for (i = 0; i < FAT_HASH_SIZE; i++)
+		INIT_HLIST_HEAD(&fat_inode_hashtable[i]);
 }
 
 static inline unsigned long fat_hash(struct super_block *sb, loff_t i_pos)

@@ -80,7 +79,7 @@ void fat_attach(struct inode *inode, lof
 {
 	spin_lock(&fat_inode_lock);
 	MSDOS_I(inode)->i_pos = i_pos;
-	list_add(&MSDOS_I(inode)->i_fat_hash,
+	hlist_add_head(&MSDOS_I(inode)->i_fat_hash,
 		fat_inode_hashtable + fat_hash(inode->i_sb, i_pos));
 	spin_unlock(&fat_inode_lock);
 }

@@ -89,20 +88,19 @@ void fat_detach(struct inode *inode)
 {
 	spin_lock(&fat_inode_lock);
 	MSDOS_I(inode)->i_pos = 0;
-	list_del_init(&MSDOS_I(inode)->i_fat_hash);
+	hlist_del_init(&MSDOS_I(inode)->i_fat_hash);
 	spin_unlock(&fat_inode_lock);
 }
 
 struct inode *fat_iget(struct super_block *sb, loff_t i_pos)
 {
-	struct list_head *p = fat_inode_hashtable + fat_hash(sb, i_pos);
-	struct list_head *walk;
+	struct hlist_head *head = fat_inode_hashtable + fat_hash(sb, i_pos);
+	struct hlist_node *_p;
 	struct msdos_inode_info *i;
 	struct inode *inode = NULL;
 
 	spin_lock(&fat_inode_lock);
-	list_for_each(walk, p) {
-		i = list_entry(walk, struct msdos_inode_info, i_fat_hash);
+	hlist_for_each_entry(i, _p, head, i_fat_hash) {
 		if (i->vfs_inode.i_sb != sb)
 			continue;
 		if (i->i_pos != i_pos)

@@ -159,7 +157,7 @@ void fat_clear_inode(struct inode *inode
 	lock_kernel();
 	spin_lock(&fat_inode_lock);
 	fat_cache_inval_inode(inode);
-	list_del_init(&MSDOS_I(inode)->i_fat_hash);
+	hlist_del_init(&MSDOS_I(inode)->i_fat_hash);
 	spin_unlock(&fat_inode_lock);
 	unlock_kernel();
 }

@@ -735,7 +733,7 @@ static void init_once(void * foo, kmem_c
 
 	if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
 	    SLAB_CTOR_CONSTRUCTOR) {
-		INIT_LIST_HEAD(&ei->i_fat_hash);
+		INIT_HLIST_NODE(&ei->i_fat_hash);
 		inode_init_once(&ei->vfs_inode);
 	}
 }

diff -puN include/linux/msdos_fs_i.h~fat_hlist-for-inodehash include/linux/msdos_fs_i.h
@@ -18,7 +18,7 @@ struct msdos_inode_info {
 	int i_attrs;	/* unused attribute bits */
 	int i_ctime_ms;	/* unused change time in milliseconds */
 	loff_t i_pos;	/* on-disk position of directory entry or 0 */
-	struct list_head i_fat_hash;	/* hash by i_location */
+	struct hlist_node i_fat_hash;	/* hash by i_location */
 	struct inode vfs_inode;
 };