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ethtool: Declare netdev_rss_key as __read_mostly. 

netdev_rss_key is written to once and thereafter is read by
drivers when they are initialising. The fact that it is mostly
read and not written to makes it a candidate for a __read_mostly
declaration.

Signed-off-by: Kim Jones <kim-marie.jones@intel.com>
Signed-off-by: Alan Carey <alan.carey@intel.com>
Acked-by: Rami Rosen <rami.rosen@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Kim Jones 2016-02-02 03:51:16 +00:00 committed by David S. Miller
parent ef44967850
commit ba905f5e2f
2 changed files with 2 additions and 2 deletions
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2
include/linux/netdevice.h
View File

@ -3744,7 +3744,7 @@ void netdev_lower_state_changed(struct net_device *lower_dev,
/* RSS keys are 40 or 52 bytes long */
#define NETDEV_RSS_KEY_LEN 52
extern u8 netdev_rss_key[NETDEV_RSS_KEY_LEN];
extern u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
void netdev_rss_key_fill(void *buffer, size_t len);
int dev_get_nest_level(struct net_device *dev,

2
net/core/ethtool.c
View File

@ -632,7 +632,7 @@ static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
return 0;
}
u8 netdev_rss_key[NETDEV_RSS_KEY_LEN];
u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
void netdev_rss_key_fill(void *buffer, size_t len)
{