[PATCH] genetlink: use idr_alloc_cyclic for family->id assignment

[Marcel Holtmann]

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 <mar...@holtmann.org>
---
 net/netlink/genetlink.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c
index 288456090710..f1f2cbd7874e 100644
--- a/net/netlink/genetlink.c
+++ b/net/netlink/genetlink.c
@@ -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;
-- 
2.20.1