blob: 945f4b610998f2d89e40ce8a6a9ba768bdcf373f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 2023-2024 Oracle. All Rights Reserved.
* Author: Darrick J. Wong <djwong@kernel.org>
*/
#ifndef __XFS_BUF_MEM_H__
#define __XFS_BUF_MEM_H__
#define XMBUF_BLOCKSIZE (PAGE_SIZE)
#define XMBUF_BLOCKSHIFT (PAGE_SHIFT)
#ifdef CONFIG_XFS_MEMORY_BUFS
static inline bool xfs_buftarg_is_mem(const struct xfs_buftarg *btp)
{
return btp->bt_bdev == NULL;
}
int xmbuf_alloc(struct xfs_mount *mp, const char *descr,
struct xfs_buftarg **btpp);
void xmbuf_free(struct xfs_buftarg *btp);
int xmbuf_map_page(struct xfs_buf *bp);
void xmbuf_unmap_page(struct xfs_buf *bp);
#else
# define xfs_buftarg_is_mem(...) (false)
# define xmbuf_map_page(...) (-ENOMEM)
# define xmbuf_unmap_page(...) ((void)0)
#endif /* CONFIG_XFS_MEMORY_BUFS */
#endif /* __XFS_BUF_MEM_H__ */
|
