[PATCH v5 08/45] gfs2: dynamically allocate the gfs2-glock shrinker

[Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>]

Use new APIs to dynamically allocate the gfs2-glock shrinker.

Signed-off-by: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>
Reviewed-by: Muchun Song <songmuchun@xxxxxxxxxxxxx>
CC: Bob Peterson <rpeterso@xxxxxxxxxx>
CC: Andreas Gruenbacher <agruenba@xxxxxxxxxx>
CC: cluster-devel@xxxxxxxxxx
---
 fs/gfs2/glock.c | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index 675bfec77706..fd3eba1856a5 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -2039,11 +2039,7 @@ static unsigned long gfs2_glock_shrink_count(struct shrinker *shrink,
 	return vfs_pressure_ratio(atomic_read(&lru_count));
 }
 
-static struct shrinker glock_shrinker = {
-	.seeks = DEFAULT_SEEKS,
-	.count_objects = gfs2_glock_shrink_count,
-	.scan_objects = gfs2_glock_shrink_scan,
-};
+static struct shrinker *glock_shrinker;
 
 /**
  * glock_hash_walk - Call a function for glock in a hash bucket
@@ -2463,13 +2459,19 @@ int __init gfs2_glock_init(void)
 		return -ENOMEM;
 	}
 
-	ret = register_shrinker(&glock_shrinker, "gfs2-glock");
-	if (ret) {
+	glock_shrinker = shrinker_alloc(0, "gfs2-glock");
+	if (!glock_shrinker) {
 		destroy_workqueue(glock_workqueue);
 		rhashtable_destroy(&gl_hash_table);
-		return ret;
+		return -ENOMEM;
 	}
 
+	glock_shrinker->count_objects = gfs2_glock_shrink_count;
+	glock_shrinker->scan_objects = gfs2_glock_shrink_scan;
+	glock_shrinker->seeks = DEFAULT_SEEKS;
+
+	shrinker_register(glock_shrinker);
+
 	for (i = 0; i < GLOCK_WAIT_TABLE_SIZE; i++)
 		init_waitqueue_head(glock_wait_table + i);
 
@@ -2478,7 +2480,7 @@ int __init gfs2_glock_init(void)
 
 void gfs2_glock_exit(void)
 {
-	unregister_shrinker(&glock_shrinker);
+	shrinker_free(glock_shrinker);
 	rhashtable_destroy(&gl_hash_table);
 	destroy_workqueue(glock_workqueue);
 }
-- 
2.30.2