fuse: simplify unique ctr

Since it's a 64bit counter, it's never gonna wrap around.  Remove code
dealing with that possibility.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Reviewed-by: Ashish Samant <ashish.samant@oracle.com>

fs/fuse/dev.c

@@ -319,12 +319,7 @@ static unsigned len_args(unsigned numargs, struct fuse_arg *args)
 
 static u64 fuse_get_unique(struct fuse_conn *fc)
 {
-	fc->reqctr++;
-	/* zero is special */
-	if (fc->reqctr == 0)
-		fc->reqctr = 1;
-
-	return fc->reqctr;
+	return ++fc->reqctr;
 }
 
 static void queue_request(struct fuse_conn *fc, struct fuse_req *req)

fs/fuse/inode.c

@@ -588,7 +588,6 @@ void fuse_conn_init(struct fuse_conn *fc)
 	fc->congestion_threshold = FUSE_DEFAULT_CONGESTION_THRESHOLD;
 	fc->khctr = 0;
 	fc->polled_files = RB_ROOT;
-	fc->reqctr = 0;
 	fc->blocked = 0;
 	fc->initialized = 0;
 	fc->attr_version = 1;