efivarfs: use DCACHE_DONTCACHE instead of always_delete_dentry()

Reviewed-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

Author: Al Viro

fs/efivarfs/super.c

@@ -183,7 +183,6 @@ static int efivarfs_d_hash(const struct dentry *dentry, struct qstr *qstr)
 static const struct dentry_operations efivarfs_d_ops = {
 	.d_compare = efivarfs_d_compare,
 	.d_hash = efivarfs_d_hash,
-	.d_delete = always_delete_dentry,
 };
 
 static struct dentry *efivarfs_alloc_dentry(struct dentry *parent, char *name)
@@ -351,6 +350,7 @@ static int efivarfs_fill_super(struct super_block *sb, struct fs_context *fc)
 	sb->s_magic             = EFIVARFS_MAGIC;
 	sb->s_op                = &efivarfs_ops;
 	set_default_d_op(sb, &efivarfs_d_ops);
+	sb->s_d_flags |= DCACHE_DONTCACHE;
 	sb->s_time_gran         = 1;
 
 	if (!efivar_supports_writes())