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author | 2018-09-24 19:22:54 +0300 | |
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committer | 2018-09-25 20:17:36 -0700 | |
commit | cfebd7e242d7193a9901222b3e667788810d98c1 (patch) | |
tree | f7b045d12317526af5a5258266af33b5616387ab /sound/pci/bt87x.c | |
parent | net: sched: use Qdisc rcu API instead of relying on rtnl lock (diff) | |
download | linux-dev-cfebd7e242d7193a9901222b3e667788810d98c1.tar.xz linux-dev-cfebd7e242d7193a9901222b3e667788810d98c1.zip |
net: sched: change tcf block reference counter type to refcount_t
As a preparation for removing rtnl lock dependency from rules update path,
change tcf block reference counter type to refcount_t to allow modification
by concurrent users.
In block put function perform decrement and check reference counter once to
accommodate concurrent modification by unlocked users. After this change
tcf_chain_put at the end of block put function is called with
block->refcnt==0 and will deallocate block after the last chain is
released, so there is no need to manually deallocate block in this case.
However, if block reference counter reached 0 and there are no chains to
release, block must still be deallocated manually.
Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'sound/pci/bt87x.c')
0 files changed, 0 insertions, 0 deletions