[PATCH 3/5] dax: remove the DAXDEV_F_SYNC flag

Christoph Hellwig
2021-12-09T06:38:49Z

Remove the DAXDEV_F_SYNC flag and thus the flags argument to alloc_dax and
just let the drivers call set_dax_synchronous directly.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/dax/bus.c | 3 ++-
drivers/dax/super.c | 6 +-----
drivers/md/dm.c | 2 +-
drivers/nvdimm/pmem.c | 7 +++----
drivers/s390/block/dcssblk.c | 4 ++--
fs/fuse/virtio_fs.c | 2 +-
include/linux/dax.h | 8 ++------
7 files changed, 12 insertions(+), 20 deletions(-)

diff --git a/drivers/dax/bus.c b/drivers/dax/bus.c
index 6683d42c32c56..da2a14d096d29 100644
--- a/drivers/dax/bus.c
+++ b/drivers/dax/bus.c
@@ -1324,11 +1324,12 @@ struct dev_dax *devm_create_dev_dax(struct dev_dax_data *data)
* No dax_operations since there is no access to this device outside of
* mmap of the resulting character device.
*/
- dax_dev = alloc_dax(dev_dax, NULL, DAXDEV_F_SYNC);
+ dax_dev = alloc_dax(dev_dax, NULL);
if (IS_ERR(dax_dev)) {
rc = PTR_ERR(dax_dev);
goto err_alloc_dax;
}
+ set_dax_synchronous(dax_dev);

/* a device_dax instance is dead while the driver is not attached */
kill_dax(dax_dev);
diff --git a/drivers/dax/super.c b/drivers/dax/super.c
index e18155f43a635..e81d5ee57390f 100644
--- a/drivers/dax/super.c
+++ b/drivers/dax/super.c
@@ -345,8 +345,7 @@ static struct dax_device *dax_dev_get(dev_t devt)
return dax_dev;
}

-struct dax_device *alloc_dax(void *private, const struct dax_operations *ops,
- unsigned long flags)
+struct dax_device *alloc_dax(void *private, const struct dax_operations *ops)
{
struct dax_device *dax_dev;
dev_t devt;
@@ -366,9 +365,6 @@ struct dax_device *alloc_dax(void *private, const struct dax_operations *ops,

dax_dev->ops = ops;
dax_dev->private = private;
- if (flags & DAXDEV_F_SYNC)
- set_dax_synchronous(dax_dev);
-
return dax_dev;

err_dev:
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 4e997c02bb0a0..f4b972af10928 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1765,7 +1765,7 @@ static struct mapped_device *alloc_dev(int minor)
sprintf(md->disk->disk_name, "dm-%d", minor);

if (IS_ENABLED(CONFIG_FS_DAX)) {
- md->dax_dev = alloc_dax(md, &dm_dax_ops, 0);
+ md->dax_dev = alloc_dax(md, &dm_dax_ops);
if (IS_ERR(md->dax_dev)) {
md->dax_dev = NULL;
goto bad;
diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
index 8294f1c701baa..85b3339286bd8 100644
--- a/drivers/nvdimm/pmem.c
+++ b/drivers/nvdimm/pmem.c
@@ -402,7 +402,6 @@ static int pmem_attach_disk(struct device *dev,
struct gendisk *disk;
void *addr;
int rc;
- unsigned long flags = 0UL;

pmem = devm_kzalloc(dev, sizeof(*pmem), GFP_KERNEL);
if (!pmem)
@@ -495,13 +494,13 @@ static int pmem_attach_disk(struct device *dev,
nvdimm_badblocks_populate(nd_region, &pmem->bb, &bb_range);
disk->bb = &pmem->bb;

- if (is_nvdimm_sync(nd_region))
- flags = DAXDEV_F_SYNC;
- dax_dev = alloc_dax(pmem, &pmem_dax_ops, flags);
+ dax_dev = alloc_dax(pmem, &pmem_dax_ops);
if (IS_ERR(dax_dev)) {
rc = PTR_ERR(dax_dev);
goto out;
}
+ if (is_nvdimm_sync(nd_region))
+ set_dax_synchronous(dax_dev);
rc = dax_add_host(dax_dev, disk);
if (rc)
goto out_cleanup_dax;
diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c
index e65e83764d1ce..10823debc09bd 100644
--- a/drivers/s390/block/dcssblk.c
+++ b/drivers/s390/block/dcssblk.c
@@ -686,13 +686,13 @@ dcssblk_add_store(struct device *dev, struct device_attribute *attr, const char
if (rc)
goto put_dev;

- dev_info->dax_dev = alloc_dax(dev_info, &dcssblk_dax_ops,
- DAXDEV_F_SYNC);
+ dev_info->dax_dev = alloc_dax(dev_info, &dcssblk_dax_ops);
if (IS_ERR(dev_info->dax_dev)) {
rc = PTR_ERR(dev_info->dax_dev);
dev_info->dax_dev = NULL;
goto put_dev;
}
+ set_dax_synchronous(dev_info->dax_dev);
rc = dax_add_host(dev_info->dax_dev, dev_info->gd);
if (rc)
goto out_dax;
diff --git a/fs/fuse/virtio_fs.c b/fs/fuse/virtio_fs.c
index 242cc1c0d7ed7..5c03a0364a9bb 100644
--- a/fs/fuse/virtio_fs.c
+++ b/fs/fuse/virtio_fs.c
@@ -850,7 +850,7 @@ static int virtio_fs_setup_dax(struct virtio_device *vdev, struct virtio_fs *fs)
dev_dbg(&vdev->dev, "%s: window kaddr 0x%px phys_addr 0x%llx len 0x%llx\n",
__func__, fs->window_kaddr, cache_reg.addr, cache_reg.len);

- fs->dax_dev = alloc_dax(fs, &virtio_fs_dax_ops, 0);
+ fs->dax_dev = alloc_dax(fs, &virtio_fs_dax_ops);
if (IS_ERR(fs->dax_dev))
return PTR_ERR(fs->dax_dev);

diff --git a/include/linux/dax.h b/include/linux/dax.h
index 3bd1fdb5d5f4b..c04f46478e3b5 100644
--- a/include/linux/dax.h
+++ b/include/linux/dax.h
@@ -6,9 +6,6 @@
#include <linux/mm.h>
#include <linux/radix-tree.h>

-/* Flag for synchronous flush */
-#define DAXDEV_F_SYNC (1UL << 0)
-
typedef unsigned long dax_entry_t;

struct dax_device;
@@ -42,8 +39,7 @@ struct dax_operations {
};

#if IS_ENABLED(CONFIG_DAX)
-struct dax_device *alloc_dax(void *private, const struct dax_operations *ops,
- unsigned long flags);
+struct dax_device *alloc_dax(void *private, const struct dax_operations *ops);
void put_dax(struct dax_device *dax_dev);
void kill_dax(struct dax_device *dax_dev);
void dax_write_cache(struct dax_device *dax_dev, bool wc);
@@ -64,7 +60,7 @@ static inline bool daxdev_mapping_supported(struct vm_area_struct *vma,
}
#else
static inline struct dax_device *alloc_dax(void *private,
- const struct dax_operations *ops, unsigned long flags)
+ const struct dax_operations *ops)
{
/*
* Callers should check IS_ENABLED(CONFIG_DAX) to know if this
--
2.30.2