diff options
Diffstat (limited to 'drivers/dax')
| -rw-r--r-- | drivers/dax/super.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/dax/super.c b/drivers/dax/super.c index 8b458f1b30c7..557b93703532 100644 --- a/drivers/dax/super.c +++ b/drivers/dax/super.c @@ -46,6 +46,8 @@ void dax_read_unlock(int id) EXPORT_SYMBOL_GPL(dax_read_unlock); #ifdef CONFIG_BLOCK +#include <linux/blkdev.h> + int bdev_dax_pgoff(struct block_device *bdev, sector_t sector, size_t size, pgoff_t *pgoff) { @@ -59,6 +61,16 @@ int bdev_dax_pgoff(struct block_device *bdev, sector_t sector, size_t size, } EXPORT_SYMBOL(bdev_dax_pgoff); +#if IS_ENABLED(CONFIG_FS_DAX) +struct dax_device *fs_dax_get_by_bdev(struct block_device *bdev) +{ + if (!blk_queue_dax(bdev->bd_queue)) + return NULL; + return fs_dax_get_by_host(bdev->bd_disk->disk_name); +} +EXPORT_SYMBOL_GPL(fs_dax_get_by_bdev); +#endif + /** * __bdev_dax_supported() - Check if the device supports dax for filesystem * @sb: The superblock of the device |