From: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx> The debugfs_remove_recursive() will wait for debugfs_file_put() to return, so there is no need to put it after synchronize_srcu() to wait for the rcu read-side critical section to exit. Just move it before synchronize_srcu(), which is also convenient to put the heavy synchronize_srcu() in the delayed work later. Signed-off-by: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx> --- mm/vmscan.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index eeca83e28c9b..a773e97e152e 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -818,11 +818,11 @@ void unregister_shrinker(struct shrinker *shrinker) debugfs_entry = shrinker_debugfs_detach(shrinker, &debugfs_id); mutex_unlock(&shrinker_mutex); + shrinker_debugfs_remove(debugfs_entry, debugfs_id); + atomic_inc(&shrinker_srcu_generation); synchronize_srcu(&shrinker_srcu); - shrinker_debugfs_remove(debugfs_entry, debugfs_id); - kfree(shrinker->nr_deferred); shrinker->nr_deferred = NULL; }
