1 files changed, 10 insertions, 21 deletions

diff --git a/fs/fscache/cookie.c b/fs/fscache/cookie.c
index 83bfe04456b6..c550512ce335 100644
--- a/fs/fscache/cookie.c
+++ b/fs/fscache/cookie.c
@@ -70,20 +70,7 @@ void fscache_free_cookie(struct fscache_cookie *cookie)
 }
 
 /*
- * initialise an cookie jar slab element prior to any use
- */
-void fscache_cookie_init_once(void *_cookie)
-{
-	struct fscache_cookie *cookie = _cookie;
-
-	memset(cookie, 0, sizeof(*cookie));
-	spin_lock_init(&cookie->lock);
-	spin_lock_init(&cookie->stores_lock);
-	INIT_HLIST_HEAD(&cookie->backing_objects);
-}
-
-/*
- * Set the index key in a cookie.  The cookie struct has space for a 12-byte
+ * Set the index key in a cookie.  The cookie struct has space for a 16-byte
  * key plus length and hash, but if that's not big enough, it's instead a
  * pointer to a buffer containing 3 bytes of hash, 1 byte of length and then
  * the key data.
@@ -93,20 +80,18 @@ static int fscache_set_key(struct fscache_cookie *cookie,
 {
 	unsigned long long h;
 	u32 *buf;
+	int bufs;
 	int i;
 
-	cookie->key_len = index_key_len;
+	bufs = DIV_ROUND_UP(index_key_len, sizeof(*buf));
 
 	if (index_key_len > sizeof(cookie->inline_key)) {
-		buf = kzalloc(index_key_len, GFP_KERNEL);
+		buf = kcalloc(bufs, sizeof(*buf), GFP_KERNEL);
 		if (!buf)
 			return -ENOMEM;
 		cookie->key = buf;
 	} else {
 		buf = (u32 *)cookie->inline_key;
-		buf[0] = 0;
-		buf[1] = 0;
-		buf[2] = 0;
 	}
 
 	memcpy(buf, index_key, index_key_len);
@@ -116,7 +101,8 @@ static int fscache_set_key(struct fscache_cookie *cookie,
 	 */
 	h = (unsigned long)cookie->parent;
 	h += index_key_len + cookie->type;
-	for (i = 0; i < (index_key_len + sizeof(u32) - 1) / sizeof(u32); i++)
+
+	for (i = 0; i < bufs; i++)
 		h += buf[i];
 
 	cookie->key_hash = h ^ (h >> 32);
@@ -161,7 +147,7 @@ struct fscache_cookie *fscache_alloc_cookie(
 	struct fscache_cookie *cookie;
 
 	/* allocate and initialise a cookie */
-	cookie = kmem_cache_alloc(fscache_cookie_jar, GFP_KERNEL);
+	cookie = kmem_cache_zalloc(fscache_cookie_jar, GFP_KERNEL);
 	if (!cookie)
 		return NULL;
 
@@ -192,6 +178,9 @@ struct fscache_cookie *fscache_alloc_cookie(
 	cookie->netfs_data	= netfs_data;
 	cookie->flags		= (1 << FSCACHE_COOKIE_NO_DATA_YET);
 	cookie->type		= def->type;
+	spin_lock_init(&cookie->lock);
+	spin_lock_init(&cookie->stores_lock);
+	INIT_HLIST_HEAD(&cookie->backing_objects);
 
 	/* radix tree insertion won't use the preallocation pool unless it's
 	 * told it may not wait */