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| author | Paul E. McKenney <paulmck@linux.ibm.com> | 2018-11-05 23:20:57 +0100 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.ibm.com> | 2018-11-12 18:03:59 +0100 |
| commit | 117f683c6e0104e1d6dfe8f143ea9c24ab069044 (patch) | |
| tree | bbc722e9f6c291675a4b7934ebf25d28275f99c2 /kernel/rcu/tree_plugin.h | |
| parent | rcu: Speed up expedited GPs when interrupting RCU reader (diff) | |
| download | linux-117f683c6e0104e1d6dfe8f143ea9c24ab069044.tar.xz linux-117f683c6e0104e1d6dfe8f143ea9c24ab069044.zip | |
rcu: Replace this_cpu_ptr() with __this_cpu_read()
Because __this_cpu_read() can be lighter weight than equivalent uses of
this_cpu_ptr(), this commit replaces the latter with the former.
Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>
Diffstat (limited to 'kernel/rcu/tree_plugin.h')
| -rw-r--r-- | kernel/rcu/tree_plugin.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h index 618956cc7a55..0bb1c1593ca4 100644 --- a/kernel/rcu/tree_plugin.h +++ b/kernel/rcu/tree_plugin.h @@ -597,7 +597,7 @@ rcu_preempt_deferred_qs_irqrestore(struct task_struct *t, unsigned long flags) */ static bool rcu_preempt_need_deferred_qs(struct task_struct *t) { - return (this_cpu_ptr(&rcu_data)->deferred_qs || + return (__this_cpu_read(rcu_data.deferred_qs) || READ_ONCE(t->rcu_read_unlock_special.s)) && t->rcu_read_lock_nesting <= 0; } |