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net: dsa: add ds_to_priv 

DSA drivers have a trick which consists in allocating "priv_size" more
bytes to account for the DSA driver private context. Add a helper
function to access that private context instead of open-coding it in
drivers with (void *)(ds + 1).

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli 2014-04-28 11:14:27 -07:00 committed by David S. Miller
parent ed036f809a
commit 7fa857ed04
1 changed files with 5 additions and 0 deletions
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5
include/net/dsa.h
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@ -181,6 +181,11 @@ struct dsa_switch_driver {
void register_switch_driver(struct dsa_switch_driver *type);
void unregister_switch_driver(struct dsa_switch_driver *type);
static inline void *ds_to_priv(struct dsa_switch *ds)
{
return (void *)(ds + 1);
}
/*
* The original DSA tag format and some other tag formats have no
* ethertype, which means that we need to add a little hack to the