From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joe Perches Subject: [PATCH -next] etherdevice: Add ether_addr_equal_unaligned Date: Fri, 06 Dec 2013 14:21:01 -0800 Message-ID: <1386368461.31845.38.camel@joe-AO722> References: <1386317890.31845.26.camel@joe-AO722> <20131206.153944.1382127535160341376.davem@davemloft.net> <1386364621.31845.32.camel@joe-AO722> <20131206.163806.1555069105347405484.davem@davemloft.net> Reply-To: The list for a Better Approach To Mobile Ad-hoc Networking Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit Cc: mareklindner-rVWd3aGhH2z5bpWLKbzFeg@public.gmane.org, netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, b.a.t.m.a.n-ZwoEplunGu2X36UT3dwllkB+6BGkLq7r@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, antonio-x4xJYDvStAgysxA8WJXlww@public.gmane.org To: David Miller Return-path: In-Reply-To: <20131206.163806.1555069105347405484.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: b.a.t.m.a.n-bounces-ZwoEplunGu2X36UT3dwllkB+6BGkLq7r@public.gmane.org Sender: "B.A.T.M.A.N" List-Id: netdev.vger.kernel.org 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 --- include/linux/etherdevice.h | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h index 3526e81..eb36845 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