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| author | Björn Töpel <bjorn.topel@intel.com> | 2019-12-19 07:10:00 +0100 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2019-12-19 21:09:43 -0800 |
| commit | 4bc188c7f23a5a308d7f15dda1b6a286d74e8954 (patch) | |
| tree | 83c19b0d701bca3d878b02c99c693b7b6df9bb82 /crypto/cfb.c | |
| parent | 0536b85239b8440735cdd910aae0eb076ebbb439 (diff) | |
| download | linux-4bc188c7f23a5a308d7f15dda1b6a286d74e8954.tar.bz2 | |
xdp: Simplify cpumap cleanup
After the RCU flavor consolidation [1], call_rcu() and
synchronize_rcu() waits for preempt-disable regions (NAPI) in addition
to the read-side critical sections. As a result of this, the cleanup
code in cpumap can be simplified
* There is no longer a need to flush in __cpu_map_entry_free, since we
know that this has been done when the call_rcu() callback is
triggered.
* When freeing the map, there is no need to explicitly wait for a
flush. It's guaranteed to be done after the synchronize_rcu() call
in cpu_map_free().
[1] https://lwn.net/Articles/777036/
Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Toke Høiland-Jørgensen <toke@redhat.com>
Link: https://lore.kernel.org/bpf/20191219061006.21980-3-bjorn.topel@gmail.com
Diffstat (limited to 'crypto/cfb.c')
0 files changed, 0 insertions, 0 deletions