ptr_ring: add ptr_ring_unconsume

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Applications that consume a batch of entries in one go
can benefit from ability to return some of them back
into the ring.

Add an API for that - assuming there's space. If there's no space
naturally can't do this and have to drop entries, but this implies ring
is full so we'd likely drop some anyway.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Michael S. Tsirkin 2017-05-17 12:14:37 +08:00 • committed by David S. Miller

parent 1fc4d180b3

commit 197a5212c3

1 changed files with 55 additions and 0 deletions

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include/linux/ptr_ring.h

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