jrcu: bugfix: process all tokens

Index: b/kernel/jrcu.c
===================================================================
@@ -659,6 +659,7 @@ static ssize_t rcu_debugfs_write(struct 
 	if (__get_user(c, &buffer[i++]))
 		return -EFAULT;
 
+next:
 	/* Token extractor -- first, skip leading whitepace */
 	while (c && isspace(c) && i < count) {
 		if (__get_user(c, &buffer[i++]))

@@ -693,8 +694,7 @@ static ssize_t rcu_debugfs_write(struct 
 		rcu_wdog_lim = wdog * USEC_PER_SEC;
 	} else
 		return -EINVAL;
-
-	return count;
+	goto next;
 }
 
 static int rcu_debugfs_open(struct inode *inode, struct file *file)