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dax: remove default copy_from_iter fallback

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Require all dax-drivers to register a ->copy_from_iter() operation so
that it is clear which dax_operations are optional and which must be
implemented for filesystem-dax to operate.

Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Suggested-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams
2017-06-27 13:06:22 -07:00
parent c9e582aa68
commit 5d61e43b39
5 changed files with 25 additions and 3 deletions
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2
drivers/dax/super.c
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@ -179,8 +179,6 @@ size_t dax_copy_from_iter(struct dax_device *dax_dev, pgoff_t pgoff, void *addr,
if (!dax_alive(dax_dev))
return 0;
if (!dax_dev->ops->copy_from_iter)
return copy_from_iter(addr, bytes, i);
return dax_dev->ops->copy_from_iter(dax_dev, pgoff, addr, bytes, i);
}
EXPORT_SYMBOL_GPL(dax_copy_from_iter);