On Mon, Oct 18, 2021 at 06:40:46AM +0200, Christoph Hellwig wrote:
> Replace the dax_host_hash with an xarray indexed by the pointer value
> of the gendisk, and require explicitl calls from the block drivers that
> want to associate their gendisk with a dax_device.
>
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
> ---
> drivers/dax/bus.c | 2 +-
> drivers/dax/super.c | 106 +++++++++--------------------------
> drivers/md/dm.c | 6 +-
> drivers/nvdimm/pmem.c | 8 ++-
> drivers/s390/block/dcssblk.c | 11 +++-
> fs/fuse/virtio_fs.c | 2 +-
> include/linux/dax.h | 19 +++++--
> 7 files changed, 60 insertions(+), 94 deletions(-)
>
> diff --git a/drivers/dax/bus.c b/drivers/dax/bus.c
> index 6cc4da4c713d9..6d91b0186e3be 100644
> --- a/drivers/dax/bus.c
> +++ b/drivers/dax/bus.c
> @@ -1326,7 +1326,7 @@ struct dev_dax *devm_create_dev_dax(struct dev_dax_data *data)
> * No 'host' or dax_operations since there is no access to this
> * device outside of mmap of the resulting character device.
> */
NIT: this comment needs to be updated as well.
Ira
> - dax_dev = alloc_dax(dev_dax, NULL, NULL, DAXDEV_F_SYNC);
> + dax_dev = alloc_dax(dev_dax, NULL, DAXDEV_F_SYNC);
> if (IS_ERR(dax_dev)) {
> rc = PTR_ERR(dax_dev);
> goto err_alloc_dax;
[snip]
