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iomap: renumber IOMAP_HOLE to 0

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Instead of keeping a separate unnamed state for uninitialized iomaps,
renumber IOMAP_HOLE to zero so that an uninitialized iomap is treated
as a hole.

Suggested-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Christoph Hellwig 2019-10-18 16:43:08 -07:00 committed by Darrick J. Wong
parent 32a38a4991
commit eb81cf9d0e
1 changed files with 5 additions and 5 deletions
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10
include/linux/iomap.h
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@ -23,11 +23,11 @@ struct vm_fault;
/*
* Types of block ranges for iomap mappings:
*/
#define IOMAP_HOLE 0x01 /* no blocks allocated, need allocation */
#define IOMAP_DELALLOC 0x02 /* delayed allocation blocks */
#define IOMAP_MAPPED 0x03 /* blocks allocated at @addr */
#define IOMAP_UNWRITTEN 0x04 /* blocks allocated at @addr in unwritten state */
#define IOMAP_INLINE 0x05 /* data inline in the inode */
#define IOMAP_HOLE 0 /* no blocks allocated, need allocation */
#define IOMAP_DELALLOC 1 /* delayed allocation blocks */
#define IOMAP_MAPPED 2 /* blocks allocated at @addr */
#define IOMAP_UNWRITTEN 3 /* blocks allocated at @addr in unwritten state */
#define IOMAP_INLINE 4 /* data inline in the inode */
/*
* Flags reported by the file system from iomap_begin: