31 lines
831 B
C
31 lines
831 B
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2023-2024 Oracle. All Rights Reserved.
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* Author: Darrick J. Wong <djwong@kernel.org>
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*/
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#ifndef __XFS_BUF_MEM_H__
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#define __XFS_BUF_MEM_H__
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#define XMBUF_BLOCKSIZE (PAGE_SIZE)
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#define XMBUF_BLOCKSHIFT (PAGE_SHIFT)
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#ifdef CONFIG_XFS_MEMORY_BUFS
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static inline bool xfs_buftarg_is_mem(const struct xfs_buftarg *btp)
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{
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return btp->bt_bdev == NULL;
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}
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int xmbuf_alloc(struct xfs_mount *mp, const char *descr,
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struct xfs_buftarg **btpp);
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void xmbuf_free(struct xfs_buftarg *btp);
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int xmbuf_map_page(struct xfs_buf *bp);
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void xmbuf_unmap_page(struct xfs_buf *bp);
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#else
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# define xfs_buftarg_is_mem(...) (false)
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# define xmbuf_map_page(...) (-ENOMEM)
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# define xmbuf_unmap_page(...) ((void)0)
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#endif /* CONFIG_XFS_MEMORY_BUFS */
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#endif /* __XFS_BUF_MEM_H__ */
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