[PATCH v4 16/48] quota: dynamically allocate the dquota-cache shrinker

[Qi Zheng]

Use new APIs to dynamically allocate the dquota-cache shrinker.

Signed-off-by: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>
Reviewed-by: Muchun Song <songmuchun@xxxxxxxxxxxxx>
---
 fs/quota/dquot.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index 9e72bfe8bbad..c303cffdf433 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -791,12 +791,6 @@ dqcache_shrink_count(struct shrinker *shrink, struct shrink_control *sc)
 	percpu_counter_read_positive(&dqstats.counter[DQST_FREE_DQUOTS]));
 }
 
-static struct shrinker dqcache_shrinker = {
-	.count_objects = dqcache_shrink_count,
-	.scan_objects = dqcache_shrink_scan,
-	.seeks = DEFAULT_SEEKS,
-};
-
 /*
  * Safely release dquot and put reference to dquot.
  */
@@ -2956,6 +2950,7 @@ static int __init dquot_init(void)
 {
 	int i, ret;
 	unsigned long nr_hash, order;
+	struct shrinker *dqcache_shrinker;
 
 	printk(KERN_NOTICE "VFS: Disk quotas %s\n", __DQUOT_VERSION__);
 
@@ -2990,8 +2985,15 @@ static int __init dquot_init(void)
 	pr_info("VFS: Dquot-cache hash table entries: %ld (order %ld,"
 		" %ld bytes)\n", nr_hash, order, (PAGE_SIZE << order));
 
-	if (register_shrinker(&dqcache_shrinker, "dquota-cache"))
-		panic("Cannot register dquot shrinker");
+	dqcache_shrinker = shrinker_alloc(0, "dquota-cache");
+	if (!dqcache_shrinker)
+		panic("Cannot allocate dquot shrinker");
+
+	dqcache_shrinker->count_objects = dqcache_shrink_count;
+	dqcache_shrinker->scan_objects = dqcache_shrink_scan;
+	dqcache_shrinker->seeks = DEFAULT_SEEKS;
+
+	shrinker_register(dqcache_shrinker);
 
 	return 0;
 }
-- 
2.30.2