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Commit 1ce8e7b5 authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

net: ALIGN/PTR_ALIGN cleanup in alloc_netdev_mq()/netdev_priv() 



Use ALIGN() and PTR_ALIGN() macros instead of handcoding them.

Get rid of NETDEV_ALIGN_CONST ugly define

Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 0bb32417

include/linux/netdevice.h

+1 −4
Original line number Diff line number Diff line
@@ -905,7 +905,6 @@ struct net_device 
#define to_net_dev(d) container_of(d, struct net_device, dev)



#define	NETDEV_ALIGN		32

#define	NETDEV_ALIGN_CONST	(NETDEV_ALIGN - 1)



static inline

struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
@@ -976,9 +975,7 @@ static inline bool netdev_uses_trailer_tags(struct net_device *dev) 
 */

static inline void *netdev_priv(const struct net_device *dev)

{

	return (char *)dev + ((sizeof(struct net_device)

			       + NETDEV_ALIGN_CONST)

			      & ~NETDEV_ALIGN_CONST);

	return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);

}



/* Set the sysfs physical device reference for the network logical device

net/core/dev.c

+4 −5
Original line number Diff line number Diff line
@@ -4988,18 +4988,18 @@ struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name, 
	struct netdev_queue *tx;

	struct net_device *dev;

	size_t alloc_size;

	void *p;

	struct net_device *p;



	BUG_ON(strlen(name) >= sizeof(dev->name));



	alloc_size = sizeof(struct net_device);

	if (sizeof_priv) {

		/* ensure 32-byte alignment of private area */

		alloc_size = (alloc_size + NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST;

		alloc_size = ALIGN(alloc_size, NETDEV_ALIGN);

		alloc_size += sizeof_priv;

	}

	/* ensure 32-byte alignment of whole construct */

	alloc_size += NETDEV_ALIGN_CONST;

	alloc_size += NETDEV_ALIGN - 1;



	p = kzalloc(alloc_size, GFP_KERNEL);

	if (!p) {
@@ -5014,8 +5014,7 @@ struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name, 
		goto free_p;

	}



	dev = (struct net_device *)

		(((long)p + NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);

	dev = PTR_ALIGN(p, NETDEV_ALIGN);

	dev->padded = (char *)dev - (char *)p;



	if (dev_addr_init(dev))

net/mac80211/main.c

+2 −6
Original line number Diff line number Diff line
@@ -735,9 +735,7 @@ struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 
	 * +-------------------------+

	 *

	 */

	priv_size = ((sizeof(struct ieee80211_local) +

		      NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +

		    priv_data_len;

	priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;



	wiphy = wiphy_new(&mac80211_config_ops, priv_size);
@@ -754,9 +752,7 @@ struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 


	local->hw.wiphy = wiphy;



	local->hw.priv = (char *)local +

			 ((sizeof(struct ieee80211_local) +

			   NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);

	local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);



	BUG_ON(!ops->tx);

	BUG_ON(!ops->start);