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There is only a single place in the kernel that regisers the "calcit"
callback (to determine min allocation for dumps).
This is in rtnetlink.c for PF_UNSPEC RTM_GETLINK.
The function that checks for calcit presence at run time will first check
the requested family (which will always fail for !PF_UNSPEC as no callsite
registers this), then falls back to checking PF_UNSPEC.
Therefore we can just check if type is RTM_GETLINK and then do a direct
call. Because of fallback to PF_UNSPEC all RTM_GETLINK types used this
regardless of family.
This has the advantage that we don't need to allocate space for
the function pointer for all the other families.
A followup patch will drop the calcit function pointer from the
rtnl_link callback structure.
Signed-off-by: Florian Westphal <fw@strlen.de>
Reviewed-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
e1fa6d216d