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| author | Paul E. McKenney <paulmck@kernel.org> | 2020-02-03 14:20:00 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2020-02-20 15:58:23 -0800 |
| commit | faa059c397dec8a452c79e9dba64419113ea64e2 (patch) | |
| tree | 14e7cbd40cf86f678ff2e373323cfe0469939d26 /mm | |
| parent | 92c0b889f2ff6898710d49458b6eae1de50895c6 (diff) | |
rcu: Optimize and protect atomic_cmpxchg() loop
This commit reworks the atomic_cmpxchg() loop in rcu_eqs_special_set()
to do only the initial read from the current CPU's rcu_data structure's
->dynticks field explicitly. On subsequent passes, this value is instead
retained from the failing atomic_cmpxchg() operation.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions