linux/drivers/md/dm-cache-block-types.h
Heinz Mauelshagen 3bd9400307 dm: add missing SPDX-License-Indentifiers
'GPL-2.0-only' is used instead of 'GPL-2.0' because SPDX has
deprecated its use.

Suggested-by: John Wiele <jwiele@redhat.com>
Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
2023-02-14 14:23:06 -05:00

56 lines
1.1 KiB
C

/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2012 Red Hat, Inc.
*
* This file is released under the GPL.
*/
#ifndef DM_CACHE_BLOCK_TYPES_H
#define DM_CACHE_BLOCK_TYPES_H
#include "persistent-data/dm-block-manager.h"
/*----------------------------------------------------------------*/
/*
* It's helpful to get sparse to differentiate between indexes into the
* origin device, indexes into the cache device, and indexes into the
* discard bitset.
*/
typedef dm_block_t __bitwise dm_oblock_t;
typedef uint32_t __bitwise dm_cblock_t;
typedef dm_block_t __bitwise dm_dblock_t;
static inline dm_oblock_t to_oblock(dm_block_t b)
{
return (__force dm_oblock_t) b;
}
static inline dm_block_t from_oblock(dm_oblock_t b)
{
return (__force dm_block_t) b;
}
static inline dm_cblock_t to_cblock(uint32_t b)
{
return (__force dm_cblock_t) b;
}
static inline uint32_t from_cblock(dm_cblock_t b)
{
return (__force uint32_t) b;
}
static inline dm_dblock_t to_dblock(dm_block_t b)
{
return (__force dm_dblock_t) b;
}
static inline dm_block_t from_dblock(dm_dblock_t b)
{
return (__force dm_block_t) b;
}
#endif /* DM_CACHE_BLOCK_TYPES_H */