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ieee802154: 6lowpan: trivial checks at first
This patch moves some trivial checks at first before calling skb_share_check which could do some memcpy if the buffer is shared. Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com> Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
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