[RFC PATCH v3 06/10] make mnt_cache statically allocated

[Al Viro]

Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
---
 fs/namespace.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/fs/namespace.c b/fs/namespace.c
index f5905f4ec560..330ac43efb8d 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -34,6 +34,7 @@
 #include <linux/mnt_idmapping.h>
 #include <linux/pidfs.h>
 #include <linux/nstree.h>
+#include <linux/slab-static.h>
 
 #include "pnode.h"
 #include "internal.h"
@@ -79,7 +80,8 @@ static u64 mnt_id_ctr = MNT_UNIQUE_ID_OFFSET;
 
 static struct hlist_head *mount_hashtable __ro_after_init;
 static struct hlist_head *mountpoint_hashtable __ro_after_init;
-static struct kmem_cache *mnt_cache __ro_after_init;
+static struct kmem_cache_opaque __mnt_cache;
+#define mnt_cache to_kmem_cache(&__mnt_cache)
 static DECLARE_RWSEM(namespace_sem);
 static HLIST_HEAD(unmounted);	/* protected by namespace_sem */
 static LIST_HEAD(ex_mountpoints); /* protected by namespace_sem */
@@ -6234,7 +6236,7 @@ void __init mnt_init(void)
 {
 	int err;
 
-	mnt_cache = kmem_cache_create("mnt_cache", sizeof(struct mount),
+	kmem_cache_setup(mnt_cache, "mnt_cache", sizeof(struct mount),
 			0, SLAB_HWCACHE_ALIGN|SLAB_PANIC|SLAB_ACCOUNT, NULL);
 
 	mount_hashtable = alloc_large_system_hash("Mount-cache",
-- 
2.47.3