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Revision b36b0fe96af13460278bf9b173beced1bd15f85d authored by David Woodhouse on 06 January 2021, 15:39:56 UTC, committed by Juergen Gross on 13 January 2021, 15:12:06 UTC 
x86/xen: Add xen_no_vector_callback option to test PCI INTX delivery
 
It's useful to be able to test non-vector event channel delivery, to make
sure Linux will work properly on older Xen which doesn't have it.

It's also useful for those working on Xen and Xen-compatible hypervisors,
because there are guest kernels still in active use which use PCI INTX
even when vector delivery is available.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Link: https://lore.kernel.org/r/20210106153958.584169-4-dwmw2@infradead.org
Signed-off-by: Juergen Gross <jgross@suse.com>
1 parent 8f4fd86
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xfs_iomap.h 
// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2003-2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 */
#ifndef __XFS_IOMAP_H__
#define __XFS_IOMAP_H__

#include <linux/iomap.h>

struct xfs_inode;
struct xfs_bmbt_irec;

int xfs_iomap_write_direct(struct xfs_inode *ip, xfs_fileoff_t offset_fsb,
		xfs_fileoff_t count_fsb, struct xfs_bmbt_irec *imap);
int xfs_iomap_write_unwritten(struct xfs_inode *, xfs_off_t, xfs_off_t, bool);
xfs_fileoff_t xfs_iomap_eof_align_last_fsb(struct xfs_inode *ip,
		xfs_fileoff_t end_fsb);

int xfs_bmbt_to_iomap(struct xfs_inode *, struct iomap *,
		struct xfs_bmbt_irec *, u16);

static inline xfs_filblks_t
xfs_aligned_fsb_count(
	xfs_fileoff_t		offset_fsb,
	xfs_filblks_t		count_fsb,
	xfs_extlen_t		extsz)
{
	if (extsz) {
		xfs_extlen_t	align;

		div_u64_rem(offset_fsb, extsz, &align);
		if (align)
			count_fsb += align;
		div_u64_rem(count_fsb, extsz, &align);
		if (align)
			count_fsb += extsz - align;
	}

	return count_fsb;
}

extern const struct iomap_ops xfs_buffered_write_iomap_ops;
extern const struct iomap_ops xfs_direct_write_iomap_ops;
extern const struct iomap_ops xfs_read_iomap_ops;
extern const struct iomap_ops xfs_seek_iomap_ops;
extern const struct iomap_ops xfs_xattr_iomap_ops;

#endif /* __XFS_IOMAP_H__*/
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