[PATCH 02/12] cgroup: rstat: Make cgroup_rstat_cpu_lock name readable

Namhyung Kim
2022-02-08T18:42:38Z

The raw_spin_lock_init() uses the argument to name its lockdep map.
But passing per_cpu_ptr() macro directly makes it a very very long
name as it expanded like below:

({ do { const void *__vpp_verify = (typeof((&cgroup_rstat_cpu_lock) ...

Let's fix it by passing a local variable instead. With this change,
the name now looks like:

cgrp_rstat_cpu_lock

Cc: Tejun Heo <tj@kernel.org>
Cc: Zefan Li <lizefan.x@bytedance.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: cgroups@vger.kernel.org
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
kernel/cgroup/rstat.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/kernel/cgroup/rstat.c b/kernel/cgroup/rstat.c
index 9d331ba44870..d1845f1196c9 100644
--- a/kernel/cgroup/rstat.c
+++ b/kernel/cgroup/rstat.c
@@ -286,9 +286,12 @@ void cgroup_rstat_exit(struct cgroup *cgrp)
void __init cgroup_rstat_boot(void)
{
int cpu;
+ raw_spinlock_t *cgrp_rstat_cpu_lock;

- for_each_possible_cpu(cpu)
- raw_spin_lock_init(per_cpu_ptr(&cgroup_rstat_cpu_lock, cpu));
+ for_each_possible_cpu(cpu) {
+ cgrp_rstat_cpu_lock = per_cpu_ptr(&cgroup_rstat_cpu_lock, cpu);
+ raw_spin_lock_init(cgrp_rstat_cpu_lock);
+ }
}

/*
--
2.35.0.263.gb82422642f-goog