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erofs: kill erofs_{init,exit}_inode_cache

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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@infradead.org/
Reported-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
Link: https://lore.kernel.org/r/20190904020912.63925-9-gaoxiang25@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Gao Xiang 2019-09-04 10:08:55 +08:00 committed by Greg Kroah-Hartman
parent 8a76568225
commit 1c2dfbf9c2
1 changed files with 12 additions and 19 deletions
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31
fs/erofs/super.c
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@ -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 @@ fs_err:
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");
}