ipv6: optimize ipv6 addresses compares
On 64 bit arches having efficient unaligned accesses (eg x86_64) we can use long words to reduce number of instructions for free. Joe Perches suggested to change ipv6_masked_addr_cmp() to return a bool instead of 'int', to make sure ipv6_masked_addr_cmp() cannot be used in a sorting function. Signed-off-by: NEric Dumazet <edumazet@google.com> Cc: Joe Perches <joe@perches.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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