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authorDan Williams <dan.j.williams@intel.com>2017-01-27 07:37:35 +0300
committerDan Williams <dan.j.williams@intel.com>2017-04-20 21:57:52 +0300
commitb0686260fecaa924d8eff2ace94bee70506bc308 (patch)
tree36193b32e9f64ee93c4dd02e29da9256e8930fb7 /include/linux/blkdev.h
parentd8f07aee3f2fd959878bf614d4e984900018eb9e (diff)
downloadlinux-b0686260fecaa924d8eff2ace94bee70506bc308.tar.xz
dax: introduce dax_direct_access()
Replace bdev_direct_access() with dax_direct_access() that uses dax_device and dax_operations instead of a block_device and block_device_operations for dax. Once all consumers of the old api have been converted bdev_direct_access() will be deleted. Given that block device partitioning decisions can cause dax page alignment constraints to be violated this also introduces the bdev_dax_pgoff() helper. It handles calculating a logical pgoff relative to the dax_device and also checks for page alignment. Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'include/linux/blkdev.h')
-rw-r--r--include/linux/blkdev.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index f72708399b83..612c497d1461 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1958,6 +1958,7 @@ extern int bdev_write_page(struct block_device *, sector_t, struct page *,
struct writeback_control *);
extern long bdev_direct_access(struct block_device *, struct blk_dax_ctl *);
extern int bdev_dax_supported(struct super_block *, int);
+int bdev_dax_pgoff(struct block_device *, sector_t, size_t, pgoff_t *pgoff);
#else /* CONFIG_BLOCK */
struct block_device;