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genetlink: use idr_alloc_cyclic for family->id assignment 

When allocating the next family->id it makes more sense to use
idr_alloc_cyclic to avoid re-using a previously used family->id as much
as possible.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Marcel Holtmann 2019-04-24 22:18:53 +02:00 committed by David S. Miller
parent 88ef66a283
commit 4e43df38a2
1 changed files with 2 additions and 2 deletions
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4
net/netlink/genetlink.c
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@ -362,8 +362,8 @@ int genl_register_family(struct genl_family *family)
} else
family->attrbuf = NULL;
family->id = idr_alloc(&genl_fam_idr, family,
start, end + 1, GFP_KERNEL);
family->id = idr_alloc_cyclic(&genl_fam_idr, family,
start, end + 1, GFP_KERNEL);
if (family->id < 0) {
err = family->id;
goto errout_free;