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This change is primarily a preparation to ease the extension of memory limit tracking. The change does reduce the number atomic operation, during freeing of a frag queue. This does introduce a some performance improvement, as these atomic operations are at the core of the performance problems seen on NUMA systems. Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>