[PATCH] fuse: miscellaneous cleanup

 - remove some unneeded assignments

 - use kzalloc instead of kmalloc + memset

 - simplify setting sb->s_fs_info

 - in fuse_send_init() use fuse_get_request() instead of
   do_get_request() helper
Signed-off-by: Miklos Szeredi <miklos@szeredi.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

fs/fuse/dev.c

@@ -361,8 +361,8 @@ void request_send_background(struct fuse_conn *fc, struct fuse_req *req)
 void fuse_send_init(struct fuse_conn *fc)
 {
 	/* This is called from fuse_read_super() so there's guaranteed
-	   to be a request available */
-	struct fuse_req *req = do_get_request(fc);
+	   to be exactly one request available */
+	struct fuse_req *req = fuse_get_request(fc);
 	struct fuse_init_in *arg = &req->misc.init_in;
 	arg->major = FUSE_KERNEL_VERSION;
 	arg->minor = FUSE_KERNEL_MINOR_VERSION;

fs/fuse/fuse_i.h

@@ -280,14 +280,9 @@ struct fuse_conn {
 	struct backing_dev_info bdi;
 };
 
-static inline struct fuse_conn **get_fuse_conn_super_p(struct super_block *sb)
-{
-	return (struct fuse_conn **) &sb->s_fs_info;
-}
-
 static inline struct fuse_conn *get_fuse_conn_super(struct super_block *sb)
 {
-	return *get_fuse_conn_super_p(sb);
+	return sb->s_fs_info;
 }
 
 static inline struct fuse_conn *get_fuse_conn(struct inode *inode)

fs/fuse/inode.c

@@ -200,9 +200,6 @@ static void fuse_put_super(struct super_block *sb)
 
 	spin_lock(&fuse_lock);
 	fc->mounted = 0;
-	fc->user_id = 0;
-	fc->group_id = 0;
-	fc->flags = 0;
 	/* Flush all readers on this fs */
 	wake_up_all(&fc->waitq);
 	up_write(&fc->sbput_sem);
@@ -379,16 +376,15 @@ static struct fuse_conn *new_conn(void)
 {
 	struct fuse_conn *fc;
 
-	fc = kmalloc(sizeof(*fc), GFP_KERNEL);
+	fc = kzalloc(sizeof(*fc), GFP_KERNEL);
 	if (fc != NULL) {
 		int i;
-		memset(fc, 0, sizeof(*fc));
 		init_waitqueue_head(&fc->waitq);
 		INIT_LIST_HEAD(&fc->pending);
 		INIT_LIST_HEAD(&fc->processing);
 		INIT_LIST_HEAD(&fc->unused_list);
 		INIT_LIST_HEAD(&fc->background);
-		sema_init(&fc->outstanding_sem, 0);
+		sema_init(&fc->outstanding_sem, 1); /* One for INIT */
 		init_rwsem(&fc->sbput_sem);
 		for (i = 0; i < FUSE_MAX_OUTSTANDING; i++) {
 			struct fuse_req *req = fuse_request_alloc();
@@ -420,7 +416,7 @@ static struct fuse_conn *get_conn(struct file *file, struct super_block *sb)
 		fc = ERR_PTR(-EINVAL);
 	} else {
 		file->private_data = fc;
-		*get_fuse_conn_super_p(sb) = fc;
+		sb->s_fs_info = fc;
 		fc->mounted = 1;
 		fc->connected = 1;
 		fc->count = 2;