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authorJoe Perches <joe@perches.com>2013-12-07 02:21:01 +0400
committerDavid S. Miller <davem@davemloft.net>2013-12-10 05:58:10 +0400
commit73eaef87e98a96fe8b8a586f916b2721bf512efa (patch)
treeb60f5b2b508d0d643c34fde1d65d2c546b37851b /include/linux/etherdevice.h
parent4e5887934627884ae8445f524a48125f974a78c3 (diff)
downloadlinux-73eaef87e98a96fe8b8a586f916b2721bf512efa.tar.xz
etherdevice: Add ether_addr_equal_unaligned
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>
Diffstat (limited to 'include/linux/etherdevice.h')
-rw-r--r--include/linux/etherdevice.h18
1 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h
index 3526e819d7ae..2f0e3d0818bc 100644
--- a/include/linux/etherdevice.h
+++ b/include/linux/etherdevice.h
@@ -266,6 +266,24 @@ static inline bool ether_addr_equal_64bits(const u8 addr1[6+2],
}
/**
+ * 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
* @addr: Pointer to a six-byte array containing the Ethernet address