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Subject[PATCH v2 1/9] iomap: Fix misplaced page flushing
Date
If iomap_unshare_actor() unshares to an inline iomap, the page was
not being flushed. block_write_end() and __iomap_write_end() already
contain flushes, so adding it to iomap_write_end_inline() seems like
the best place. That means we can remove it from iomap_write_actor().

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
fs/iomap/buffered-io.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index 897ab9a26a74..d81a9a86c5aa 100644
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c
@@ -717,6 +717,7 @@ iomap_write_end_inline(struct inode *inode, struct page *page,
WARN_ON_ONCE(!PageUptodate(page));
BUG_ON(pos + copied > PAGE_SIZE - offset_in_page(iomap->inline_data));

+ flush_dcache_page(page);
addr = kmap_atomic(page);
memcpy(iomap->inline_data + pos, addr + pos, copied);
kunmap_atomic(addr);
@@ -810,8 +811,6 @@ iomap_write_actor(struct inode *inode, loff_t pos, loff_t length, void *data,

copied = iov_iter_copy_from_user_atomic(page, i, offset, bytes);

- flush_dcache_page(page);
-
status = iomap_write_end(inode, pos, bytes, copied, page, iomap,
srcmap);
if (unlikely(status < 0))
--
2.28.0
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