[PATCH 3.16.y-ckt 103/133] net: fix endian check warning in etherdevice.h

From: Luis Henriques
Date: Wed Sep 30 2015 - 06:10:12 EST

3.16.7-ckt18 -stable review patch. If anyone has any objections, please let me know.


From: Jesse Brandeburg <jesse.brandeburg@xxxxxxxxx>

commit fbaff3ef859a86dc3df2128d2de9f8a6e255a967 upstream.

Sparse builds have been warning for a really long time now
that etherdevice.h has a conversion that is unsafe.

include/linux/etherdevice.h:79:32: warning: restricted __be16 degrades to integer

This code change fixes the issue and generates the exact
same assembly before/after (checked on x86_64)

Fixes: 2c722fe1c821 (etherdevice: Optimize a few is_<foo>_ether_addr functions)
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@xxxxxxxxx>
CC: Joe Perches <joe@xxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Luis Henriques <luis.henriques@xxxxxxxxxxxxx>
include/linux/etherdevice.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h
index 9c5529dc6d07..b3ef0bf12754 100644
--- a/include/linux/etherdevice.h
+++ b/include/linux/etherdevice.h
@@ -72,7 +72,7 @@ static inline bool is_link_local_ether_addr(const u8 *addr)

return (((*(const u32 *)addr) ^ (*(const u32 *)b)) |
- ((a[2] ^ b[2]) & m)) == 0;
+ (__force int)((a[2] ^ b[2]) & m)) == 0;
return ((a[0] ^ b[0]) | (a[1] ^ b[1]) | ((a[2] ^ b[2]) & m)) == 0;
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