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authorStephen Hemminger <shemminger@osdl.org>2005-10-25 15:03:41 -0700
committerArnaldo Carvalho de Melo <acme@mandriva.com>2005-10-29 02:23:58 -0200
commit360ac8e2f1a38c3497739636c3b702352d1ad0ae (patch)
treef671d3ec4071a1be3bce97bcff2c8c759e597e88 /include/linux
parente83b860539d0ac1b3cff868178fa79c457e0c21f (diff)
[ETH]: ether address compare
Expose faster ether compare for use by protocols and other driver. And change name to be more consistent with other ether address manipulation routines in same file Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/etherdevice.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h
index 4522c7186bf..cc84934f905 100644
--- a/include/linux/etherdevice.h
+++ b/include/linux/etherdevice.h
@@ -104,6 +104,22 @@ static inline void random_ether_addr(u8 *addr)
addr [0] &= 0xfe; /* clear multicast bit */
addr [0] |= 0x02; /* set local assignment bit (IEEE802) */
}
+
+/**
+ * compare_ether_addr - Compare two 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 0 if equal
+ */
+static inline unsigned compare_ether_addr(const u8 *_a, const u8 *_b)
+{
+ const u16 *a = (const u16 *) _a;
+ const u16 *b = (const u16 *) _b;
+
+ BUILD_BUG_ON(ETH_ALEN != 6);
+ return ((a[0] ^ b[0]) | (a[1] ^ b[1]) | (a[2] ^ b[2])) != 0;
+}
#endif /* __KERNEL__ */
#endif /* _LINUX_ETHERDEVICE_H */