[PATCH 20/39] convert efivarfs

[Al Viro]

Initially filesystem is populated with d_alloc_name() + d_add().
That becomes d_alloc_name() + d_make_persistent() + dput().
Dynamic creation is switched to d_make_persistent();
removal - to simple_unlink() (no point open-coding it in
efivarfs_unlink(), better call it there)

Signed-off-by: Al Viro <v...@zeniv.linux.org.uk>
---
 fs/efivarfs/inode.c | 7 ++-----
 fs/efivarfs/super.c | 5 +++--
 2 files changed, 5 insertions(+), 7 deletions(-)

diff --git a/fs/efivarfs/inode.c b/fs/efivarfs/inode.c
index 2891614abf8d..95dcad83da11 100644
--- a/fs/efivarfs/inode.c
+++ b/fs/efivarfs/inode.c
@@ -113,8 +113,7 @@ static int efivarfs_create(struct mnt_idmap *idmap, struct 
inode *dir,
 
        inode->i_private = var;
 
-       d_instantiate(dentry, inode);
-       dget(dentry);
+       d_make_persistent(dentry, inode);
 
        return 0;
 }
@@ -126,9 +125,7 @@ static int efivarfs_unlink(struct inode *dir, struct dentry 
*dentry)
        if (efivar_entry_delete(var))
                return -EINVAL;
 
-       drop_nlink(d_inode(dentry));
-       dput(dentry);
-       return 0;
+       return simple_unlink(dir, dentry);
 };
 
 const struct inode_operations efivarfs_dir_inode_operations = {
diff --git a/fs/efivarfs/super.c b/fs/efivarfs/super.c
index 4bb4002e3cdf..21208660bfe2 100644
--- a/fs/efivarfs/super.c
+++ b/fs/efivarfs/super.c
@@ -278,7 +278,8 @@ static int efivarfs_create_dentry(struct super_block *sb, 
efi_char16_t *name16,
        inode->i_private = entry;
        i_size_write(inode, size + sizeof(__u32)); /* attributes + data */
        inode_unlock(inode);
-       d_add(dentry, inode);
+       d_make_persistent(dentry, inode);
+       dput(dentry);
 
        return 0;
 
@@ -522,7 +523,7 @@ static void efivarfs_kill_sb(struct super_block *sb)
        struct efivarfs_fs_info *sfi = sb->s_fs_info;
 
        blocking_notifier_chain_unregister(&efivar_ops_nh, &sfi->nb);
-       kill_litter_super(sb);
+       kill_anon_super(sb);
 
        kfree(sfi);
 }
-- 
2.47.3