dax: add dax_iomap_sector() helper function

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To be able to correctly calculate the sector from a file position and a
struct iomap there is a complex little bit of logic that currently happens
in both dax_iomap_actor() and dax_iomap_fault().  This will need to be
repeated yet again in the DAX PMD fault handler when it is added, so break
it out into a helper function.

Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Dave Chinner <david@fromorbit.com>

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Ross Zwisler 2016-11-08 11:33:09 +11:00 • committed by Dave Chinner

parent 11c59c92f4

commit 333ccc978e

1 changed files with 7 additions and 3 deletions

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fs/dax.c

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