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etherdevice: Add ether_addr_equal_unaligned

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Add a generic routine to test if possibly unaligned
to u16 Ethernet addresses are equal.

If CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS is set,
this uses the slightly faster generic routine
ether_addr_equal, otherwise this uses memcmp.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Joe Perches 2013-12-06 14:21:01 -08:00 committed by David S. Miller
parent 4e58879346
commit 73eaef87e9
1 changed files with 18 additions and 0 deletions
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18
include/linux/etherdevice.h
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@ -265,6 +265,24 @@ static inline bool ether_addr_equal_64bits(const u8 addr1[6+2],
#endif
}
/**
* ether_addr_equal_unaligned - Compare two not u16 aligned Ethernet addresses
* @addr1: Pointer to a six-byte array containing the Ethernet address
* @addr2: Pointer other six-byte array containing the Ethernet address
*
* Compare two Ethernet addresses, returns true if equal
*
* Please note: Use only when any Ethernet address may not be u16 aligned.
*/
static inline bool ether_addr_equal_unaligned(const u8 *addr1, const u8 *addr2)
{
#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS)
return ether_addr_equal(addr1, addr2);
#else
return memcmp(addr1, addr2, ETH_ALEN) == 0;
#endif
}
/**
* is_etherdev_addr - Tell if given Ethernet address belongs to the device.
* @dev: Pointer to a device structure