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authorPaul E. McKenney <paulmck@kernel.org>2021-07-29 15:35:21 -0700
committerPaul E. McKenney <paulmck@kernel.org>2021-09-13 16:32:46 -0700
commit768f5d50e6ad88363291f96a2e230442b8d633bc (patch)
treefdf72cad0ea0561849f0fb9d3072001140be98f7 /kernel/rcu
parent2caebefb00f03b5ba13d44aa6cc3723759b43822 (diff)
rcu: Simplify rcu_report_dead() call to rcu_report_exp_rdp()
Currently, rcu_report_dead() disables preemption across its call to rcu_report_exp_rdp(), but this is pointless because interrupts are already disabled by the caller. In addition, rcu_report_dead() computes the address of the outgoing CPU's rcu_data structure, which is also pointless because this address is already present in local variable rdp. This commit therefore drops the preemption disabling and passes rdp to rcu_report_exp_rdp(). Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel/rcu')
-rw-r--r--kernel/rcu/tree.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 801075e36515..dc2968473593 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -4294,9 +4294,7 @@ void rcu_report_dead(unsigned int cpu)
do_nocb_deferred_wakeup(rdp);
/* QS for any half-done expedited grace period. */
- preempt_disable();
- rcu_report_exp_rdp(this_cpu_ptr(&rcu_data));
- preempt_enable();
+ rcu_report_exp_rdp(rdp);
rcu_preempt_deferred_qs(current);
/* Remove outgoing CPU from mask in the leaf rcu_node structure. */