Orange Pi5 kernel

/*
 * fs/sdcardfs/mmap.c
 *
 * Copyright (c) 2013 Samsung Electronics Co. Ltd
 *   Authors: Daeho Jeong, Woojoong Lee, Seunghwan Hyun,
 *               Sunghwan Yun, Sungjong Seo
 *
 * This program has been developed as a stackable file system based on
 * the WrapFS which written by
 *
 * Copyright (c) 1998-2011 Erez Zadok
 * Copyright (c) 2009     Shrikar Archak
 * Copyright (c) 2003-2011 Stony Brook University
 * Copyright (c) 2003-2011 The Research Foundation of SUNY
 *
 * This file is dual licensed.  It may be redistributed and/or modified
 * under the terms of the Apache 2.0 License OR version 2 of the GNU
 * General Public License.
 */
 
#include "sdcardfs.h"
 
static int sdcardfs_fault(struct vm_fault *vmf)
{
<------>int err;
<------>struct file *file;
<------>const struct vm_operations_struct *lower_vm_ops;
 
<------>file = (struct file *)vmf->vma->vm_private_data;
<------>lower_vm_ops = SDCARDFS_F(file)->lower_vm_ops;
<------>BUG_ON(!lower_vm_ops);
 
<------>err = lower_vm_ops->fault(vmf);
<------>return err;
}
 
static void sdcardfs_vm_open(struct vm_area_struct *vma)
{
<------>struct file *file = (struct file *)vma->vm_private_data;
 
<------>get_file(file);
}
 
static void sdcardfs_vm_close(struct vm_area_struct *vma)
{
<------>struct file *file = (struct file *)vma->vm_private_data;
 
<------>fput(file);
}
 
static int sdcardfs_page_mkwrite(struct vm_fault *vmf)
{
<------>int err = 0;
<------>struct file *file;
<------>const struct vm_operations_struct *lower_vm_ops;
 
<------>file = (struct file *)vmf->vma->vm_private_data;
<------>lower_vm_ops = SDCARDFS_F(file)->lower_vm_ops;
<------>BUG_ON(!lower_vm_ops);
<------>if (!lower_vm_ops->page_mkwrite)
<------><------>goto out;
 
<------>err = lower_vm_ops->page_mkwrite(vmf);
out:
<------>return err;
}
 
static ssize_t sdcardfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
{
<------>/*
<------> * This function should never be called directly.  We need it
<------> * to exist, to get past a check in open_check_o_direct(),
<------> * which is called from do_last().
<------> */
<------>return -EINVAL;
}
 
const struct address_space_operations sdcardfs_aops = {
<------>.direct_IO	= sdcardfs_direct_IO,
};
 
const struct vm_operations_struct sdcardfs_vm_ops = {
<------>.fault		= sdcardfs_fault,
<------>.page_mkwrite	= sdcardfs_page_mkwrite,
<------>.open		= sdcardfs_vm_open,
<------>.close		= sdcardfs_vm_close,
};