net: ipv4: Move ip_options_fragment() out of loop
The ip_options_fragment() only called when iter->offset is equal to zero, so move it out of loop, and inline 'Copy the flags to each fragment.' As also, remove the unused parameter in ip_frag_ipcb(). Signed-off-by: Yajun Deng <yajun.deng@linux.dev> Signed-off-by: David S. Miller <davem@davemloft.net>
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