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rcu: Use per_cpu_ptr to get the pointer of per_cpu variable

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There are a few remaining locations in kernel/rcu that still use
"&per_cpu()".  This commit replaces them with "per_cpu_ptr(&)", and does
not introduce any functional change.

Reviewed-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Reviewed-by: Neeraj Upadhyay <neeraju@codeaurora.org>
Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Liu Song <liu.song11@zte.com.cn>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Liu Song 2021-06-30 22:08:02 +08:00 committed by Paul E. McKenney
parent eb880949ef
commit 8211e922de
3 changed files with 3 additions and 3 deletions
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2
kernel/rcu/tasks.h
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@ -920,7 +920,7 @@ static void trc_read_check_handler(void *t_in)
// Allow future IPIs to be sent on CPU and for task.
// Also order this IPI handler against any later manipulations of
// the intended task.
smp_store_release(&per_cpu(trc_ipi_to_cpu, smp_processor_id()), false); // ^^^
smp_store_release(per_cpu_ptr(&trc_ipi_to_cpu, smp_processor_id()), false); // ^^^
smp_store_release(&texp->trc_ipi_to_cpu, -1); // ^^^
}

2
kernel/rcu/tree.c
View file

@ -1286,7 +1286,7 @@ static int rcu_implicit_dynticks_qs(struct rcu_data *rdp)
*/
jtsq = READ_ONCE(jiffies_to_sched_qs);
ruqp = per_cpu_ptr(&rcu_data.rcu_urgent_qs, rdp->cpu);
rnhqp = &per_cpu(rcu_data.rcu_need_heavy_qs, rdp->cpu);
rnhqp = per_cpu_ptr(&rcu_data.rcu_need_heavy_qs, rdp->cpu);
if (!READ_ONCE(*rnhqp) &&
(time_after(jiffies, rcu_state.gp_start + jtsq * 2) ||
time_after(jiffies, rcu_state.jiffies_resched) ||

2
kernel/rcu/tree_stall.h
View file

@ -351,7 +351,7 @@ static void rcu_dump_cpu_stacks(void)
static void print_cpu_stall_fast_no_hz(char *cp, int cpu)
{
struct rcu_data *rdp = &per_cpu(rcu_data, cpu);
struct rcu_data *rdp = per_cpu_ptr(&rcu_data, cpu);
sprintf(cp, "last_accelerate: %04lx/%04lx dyntick_enabled: %d",
rdp->last_accelerate & 0xffff, jiffies & 0xffff,