summaryrefslogtreecommitdiff
path: root/include/linux/etherdevice.h
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2009-03-26 15:54:36 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-03-26 15:54:36 -0700
commit13220a94d35708d5378114e96ffcc88d0a74fe99 (patch)
treebe6530677d5f9536c7211e05ba012923e4c0b307 /include/linux/etherdevice.h
parent8690d8a9f6c2d5728a9c9f68231f1bb4de109e3a (diff)
parent08abe18af1f78ee80c3c3a5ac47c3e0ae0beadf6 (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6: (1750 commits) ixgbe: Allow Priority Flow Control settings to survive a device reset net: core: remove unneeded include in net/core/utils.c. e1000e: update version number e1000e: fix close interrupt race e1000e: fix loss of multicast packets e1000e: commonize tx cleanup routine to match e1000 & igb netfilter: fix nf_logger name in ebt_ulog. netfilter: fix warning in ebt_ulog init function. netfilter: fix warning about invalid const usage e1000: fix close race with interrupt e1000: cleanup clean_tx_irq routine so that it completely cleans ring e1000: fix tx hang detect logic and address dma mapping issues bridge: bad error handling when adding invalid ether address bonding: select current active slave when enslaving device for mode tlb and alb gianfar: reallocate skb when headroom is not enough for fcb Bump release date to 25Mar2009 and version to 0.22 r6040: Fix second PHY address qeth: fix wait_event_timeout handling qeth: check for completion of a running recovery qeth: unregister MAC addresses during recovery. ... Manually fixed up conflicts in: drivers/infiniband/hw/cxgb3/cxio_hal.h drivers/infiniband/hw/nes/nes_nic.c
Diffstat (limited to 'include/linux/etherdevice.h')
-rw-r--r--include/linux/etherdevice.h21
1 files changed, 21 insertions, 0 deletions
diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h
index 1cb0f0b90926..a1f17abba7dc 100644
--- a/include/linux/etherdevice.h
+++ b/include/linux/etherdevice.h
@@ -184,4 +184,25 @@ static inline unsigned compare_ether_addr_64bits(const u8 addr1[6+2],
}
#endif /* __KERNEL__ */
+/**
+ * compare_ether_header - Compare two Ethernet headers
+ * @a: Pointer to Ethernet header
+ * @b: Pointer to Ethernet header
+ *
+ * Compare two ethernet headers, returns 0 if equal.
+ * This assumes that the network header (i.e., IP header) is 4-byte
+ * aligned OR the platform can handle unaligned access. This is the
+ * case for all packets coming into netif_receive_skb or similar
+ * entry points.
+ */
+
+static inline int compare_ether_header(const void *a, const void *b)
+{
+ u32 *a32 = (u32 *)((u8 *)a + 2);
+ u32 *b32 = (u32 *)((u8 *)b + 2);
+
+ return (*(u16 *)a ^ *(u16 *)b) | (a32[0] ^ b32[0]) |
+ (a32[1] ^ b32[1]) | (a32[2] ^ b32[2]);
+}
+
#endif /* _LINUX_ETHERDEVICE_H */