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iomap: rework unshare flag

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Instead of another internal flags namespace inside of buffered-io.c,
just pass a UNSHARE hint in the main iomap flags field.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
This commit is contained in:
Christoph Hellwig 2021-08-10 18:33:14 -07:00 • committed by Darrick J. Wong
parent 1b5c1e36dc
commit b74b1293e6
2 changed files with 10 additions and 14 deletions
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include/linux/iomap.h
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@ -140,6 +140,7 @@ struct iomap_page_ops {
#define IOMAP_DIRECT (1 << 4) /* direct I/O */
#define IOMAP_NOWAIT (1 << 5) /* do not block */
#define IOMAP_OVERWRITE_ONLY (1 << 6) /* only pure overwrites allowed */
#define IOMAP_UNSHARE (1 << 7) /* unshare_file_range */
struct iomap_ops {
/*