linux-kernel - [RFC PATCH 15/15] turn ufs_inode

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Message-ID: <20260110040217.1927971-16-viro@zeniv.linux.org.uk>
Date: Sat, 10 Jan 2026 04:02:17 +0000
From: Al Viro <viro@...iv.linux.org.uk>
To: linux-mm@...ck.org
Cc: Vlastimil Babka <vbabka@...e.cz>,
	Harry Yoo <harry.yoo@...cle.com>,
	linux-fsdevel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Christian Brauner <brauner@...nel.org>,
	Jan Kara <jack@...e.cz>,
	Mateusz Guzik <mguzik@...il.com>,
	linux-kernel@...r.kernel.org
Subject: [RFC PATCH 15/15] turn ufs_inode_cache static-duration

A modular example I used for testing...

Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
---
 fs/ufs/super.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/fs/ufs/super.c b/fs/ufs/super.c
index 6e4585169f94..440229a5b6c9 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -90,6 +90,7 @@
 #include <linux/log2.h>
 #include <linux/seq_file.h>
 #include <linux/iversion.h>
+#include <linux/slab-static.h>
 
 #include "ufs_fs.h"
 #include "ufs.h"
@@ -1354,7 +1355,8 @@ static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
 	return 0;
 }
 
-static struct kmem_cache * ufs_inode_cachep;
+static struct kmem_cache_opaque ufs_inode_cache;
+#define ufs_inode_cachep to_kmem_cache(&ufs_inode_cache)
 
 static struct inode *ufs_alloc_inode(struct super_block *sb)
 {
@@ -1384,16 +1386,13 @@ static void init_once(void *foo)
 
 static int __init init_inodecache(void)
 {
-	ufs_inode_cachep = kmem_cache_create_usercopy("ufs_inode_cache",
+	return kmem_cache_setup_usercopy(ufs_inode_cachep, "ufs_inode_cache",
 				sizeof(struct ufs_inode_info), 0,
 				(SLAB_RECLAIM_ACCOUNT | SLAB_ACCOUNT),
 				offsetof(struct ufs_inode_info, i_u1.i_symlink),
 				sizeof_field(struct ufs_inode_info,
 					i_u1.i_symlink),
 				init_once);
-	if (ufs_inode_cachep == NULL)
-		return -ENOMEM;
-	return 0;
 }
 
 static void destroy_inodecache(void)
-- 
2.47.3