[PATCH v8 06/17] mm: Refactoring in workingset_init()

[Kirill Tkhai]

Use prealloc_shrinker()/register_shrinker_prepared()
instead of register_shrinker(). This will be used
in next patch.

Signed-off-by: Kirill Tkhai <ktk...@virtuozzo.com>
Acked-by: Vladimir Davydov <vdavydov....@gmail.com>
Tested-by: Shakeel Butt <shake...@google.com>
---
 mm/workingset.c |    9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/mm/workingset.c b/mm/workingset.c
index a466e731231d..b16489c60471 100644
--- a/mm/workingset.c
+++ b/mm/workingset.c
@@ -507,16 +507,17 @@ static int __init workingset_init(void)
        pr_info("workingset: timestamp_bits=%d max_order=%d bucket_order=%u\n",
               timestamp_bits, max_order, bucket_order);
 
-       /* list_lru lock nests inside the IRQ-safe i_pages lock */
-       ret = __list_lru_init(&shadow_nodes, true, true, &shadow_nodes_key);
+       ret = prealloc_shrinker(&workingset_shadow_shrinker);
        if (ret)
                goto err;
-       ret = register_shrinker(&workingset_shadow_shrinker);
+       /* list_lru lock nests inside the IRQ-safe i_pages lock */
+       ret = __list_lru_init(&shadow_nodes, true, true, &shadow_nodes_key);
        if (ret)
                goto err_list_lru;
+       register_shrinker_prepared(&workingset_shadow_shrinker);
        return 0;
 err_list_lru:
-       list_lru_destroy(&shadow_nodes);
+       free_prealloced_shrinker(&workingset_shadow_shrinker);
 err:
        return ret;
 }