Messages in this thread | | | Date | Tue, 25 Jun 2019 12:07:01 +0200 | From | Christoph Hellwig <> | Subject | Re: [PATCH 04/12] xfs: initialize ioma->flags in xfs_bmbt_to_iomap |
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On Mon, Jun 24, 2019 at 07:57:07AM -0700, Darrick J. Wong wrote: > On Mon, Jun 24, 2019 at 07:52:45AM +0200, Christoph Hellwig wrote: > > Currently we don't overwrite the flags field in the iomap in > > xfs_bmbt_to_iomap. This works fine with 0-initialized iomaps on stack, > > but is harmful once we want to be able to reuse an iomap in the > > writeback code. > > Is that going to affect all the other iomap users, or is xfs the only > one that assumes zero-initialized iomaps being passed into > ->iomap_begin?
This doesn't affect any existing user as they all get a zeroed iomap passed from the caller in iomap.c. It affects the writeback code once it uses struct iomap as it overwrites a previously used iomap.
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