• Johannes Berg's avatar
    genetlink: use idr to track families · 2ae0f17d
    Johannes Berg authored
    Since generic netlink family IDs are small integers, allocated
    densely, IDR is an ideal match for lookups. Replace the existing
    hand-written hash-table with IDR for allocation and lookup.
    
    This lets the families only be written to once, during register,
    since the list_head can be removed and removal of a family won't
    cause any writes.
    
    It also slightly reduces the code size (by about 1.3k on x86-64).
    Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    2ae0f17d
genetlink.c 25.1 KB