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xfs: add support for sub-pagesize writeback without buffer_heads

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Switch to using the iomap_page structure for checking sub-page uptodate
status and track sub-page I/O completion status, and remove large
quantities of boilerplate code working around buffer heads.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>
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
2018-07-11 22:26:05 -07:00
committed by Darrick J. Wong
parent 9dc55f1389
commit 82cb14175e
5 changed files with 61 additions and 455 deletions
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1
fs/xfs/xfs_buf.h
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@@ -12,7 +12,6 @@
#include <linux/mm.h>
#include <linux/fs.h>
#include <linux/dax.h>
#include <linux/buffer_head.h>
#include <linux/uio.h>
#include <linux/list_lru.h>