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| author |   Stephen Hemminger <shemminger@osdl.org> | 2005-10-25 15:03:41 -0700 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@mandriva.com> | 2005-10-29 02:23:58 -0200 |
| commit | 360ac8e2f1a38c3497739636c3b702352d1ad0ae (patch) | |
| tree | f671d3ec4071a1be3bce97bcff2c8c759e597e88 /include/linux/etherdevice.h | |
| parent | [TCP]: fix tcp_tso_win_divisor documentation (diff) | |
| download | linux-dev-360ac8e2f1a38c3497739636c3b702352d1ad0ae.tar.xz linux-dev-360ac8e2f1a38c3497739636c3b702352d1ad0ae.zip | |
[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/etherdevice.h')
| -rw-r--r-- | include/linux/etherdevice.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h index 4522c7186bf3..cc84934f9059 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 */ |