iomap: zero newly allocated mapped blocks

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File systems like gfs2 don't support delayed allocations or unwritten
extents and thus allocate normal mapped blocks to fill holes.  To
cover the case of such file systems allocating new blocks to fill holes
also zero out mapped blocks with the new flag.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>

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Christoph Hellwig 2019-10-17 13:12:12 -07:00 • committed by Darrick J. Wong

parent 760fea8bfb

commit 009d8d849d

1 changed files with 10 additions and 2 deletions

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fs/iomap/buffered-io.c

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