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net: help compiler generate better code in eth_get_headlen
[firefly-linux-kernel-4.4.55.git]
/
net
/
ethernet
/
eth.c
diff --git
a/net/ethernet/eth.c
b/net/ethernet/eth.c
index d850fdc828f932c20191741a75bf90acffb9f55f..9e63f252a89ead08fda157e716607938452c0b49 100644
(file)
--- a/
net/ethernet/eth.c
+++ b/
net/ethernet/eth.c
@@
-127,7
+127,7
@@
u32 eth_get_headlen(void *data, unsigned int len)
struct flow_keys keys;
/* this should never happen, but better safe than sorry */
- if (
len < sizeof(*eth
))
+ if (
unlikely(len < sizeof(*eth)
))
return len;
/* parse any remaining L2/L3 headers, check for L4 */