From: Gao Xiang <gaoxiang25@xxxxxxxxxx> As Christoph said [1] "having this function seems entirely pointless", let's kill those. filesystem function name ext2,f2fs,ext4,isofs,squashfs,cifs,... init_inodecache In addition, add a necessary "rcu_barrier()" on exit_fs(); [1] https://lore.kernel.org/r/20190829101545.GC20598@xxxxxxxxxxxxx/ Reported-by: Christoph Hellwig <hch@xxxxxxxxxxxxx> Signed-off-by: Gao Xiang <gaoxiang25@xxxxxxxxxx> --- fs/erofs/super.c | 31 ++++++++++++------------------- 1 file changed, 12 insertions(+), 19 deletions(-) diff --git a/fs/erofs/super.c b/fs/erofs/super.c index 6603f0ba8905..0c412de33315 100644 --- a/fs/erofs/super.c +++ b/fs/erofs/super.c @@ -23,21 +23,6 @@ static void init_once(void *ptr) inode_init_once(&vi->vfs_inode); } -static int __init erofs_init_inode_cache(void) -{ - erofs_inode_cachep = kmem_cache_create("erofs_inode", - sizeof(struct erofs_vnode), 0, - SLAB_RECLAIM_ACCOUNT, - init_once); - - return erofs_inode_cachep ? 0 : -ENOMEM; -} - -static void erofs_exit_inode_cache(void) -{ - kmem_cache_destroy(erofs_inode_cachep); -} - static struct inode *alloc_inode(struct super_block *sb) { struct erofs_vnode *vi = @@ -531,9 +516,14 @@ static int __init erofs_module_init(void) erofs_check_ondisk_layout_definitions(); infoln("initializing erofs " EROFS_VERSION); - err = erofs_init_inode_cache(); - if (err) + erofs_inode_cachep = kmem_cache_create("erofs_inode", + sizeof(struct erofs_vnode), 0, + SLAB_RECLAIM_ACCOUNT, + init_once); + if (!erofs_inode_cachep) { + err = -ENOMEM; goto icache_err; + } err = erofs_init_shrinker(); if (err) @@ -555,7 +545,7 @@ static int __init erofs_module_init(void) zip_err: erofs_exit_shrinker(); shrinker_err: - erofs_exit_inode_cache(); + kmem_cache_destroy(erofs_inode_cachep); icache_err: return err; } @@ -565,7 +555,10 @@ static void __exit erofs_module_exit(void) unregister_filesystem(&erofs_fs_type); z_erofs_exit_zip_subsystem(); erofs_exit_shrinker(); - erofs_exit_inode_cache(); + + /* Ensure all RCU free inodes are safe before cache is destroyed. */ + rcu_barrier(); + kmem_cache_destroy(erofs_inode_cachep); infoln("successfully finalize erofs"); } -- 2.17.1
