netdev - Re: [PATCH net-next 02/11] net: Introduce new api for walking upper and lower devices

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Date:   Mon, 17 Oct 2016 10:42:00 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     stephen@...workplumber.org
Cc:     dsa@...ulusnetworks.com, jiri@...lanox.com, netdev@...r.kernel.org,
        dledford@...hat.com, sean.hefty@...el.com,
        hal.rosenstock@...il.com, linux-rdma@...r.kernel.org,
        j.vosburgh@...il.com, vfalico@...il.com, andy@...yhouse.net,
        jeffrey.t.kirsher@...el.com, intel-wired-lan@...ts.osuosl.org
Subject: Re: [PATCH net-next 02/11] net: Introduce new api for walking
 upper and lower devices

From: Stephen Hemminger <stephen@...workplumber.org>
Date: Mon, 17 Oct 2016 05:21:21 -0700

> You should write this more succinctly as:
> 
> static bool __netdev_has_upper_dev(struct net_device *upper_dev, void *data)
> {
> 	struct net_device *dev = data;
> 
> 	return upper_dev == dev;
> }
> 
> bool netdev_has_upper_dev_all_rcu(struct net_device *dev,
> 				  struct net_device *upper_dev)
> {
> 	return netdev_walk_all_upper_dev_rcu(dev,
> 			__netdev_has_upper_dev, upper_dev);
> }
> 
> No if/else needed. No cast of void * ptr need. Use const if possible?

Agreed.