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authorChristoph Hellwig <hch@lst.de>2021-11-29 13:21:42 +0300
committerDan Williams <dan.j.williams@intel.com>2021-12-04 19:58:51 +0300
commit7b0800d00dae8c897398abaf61e82db0d67d7afc (patch)
tree1d24e8995f2a54b0037b9c911c0bc9293ea6f102 /drivers
parent679a99495b8fda800037b25af8cd990eb7dd72c9 (diff)
downloadlinux-7b0800d00dae8c897398abaf61e82db0d67d7afc.tar.xz
dax: remove dax_capable
Just open code the block size and dax_dev == NULL checks in the callers. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Mike Snitzer <snitzer@redhat.com> Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com> [erofs] Reviewed-by: Dan Williams <dan.j.williams@intel.com> Reviewed-by: Darrick J. Wong <djwong@kernel.org> Link: https://lore.kernel.org/r/20211129102203.2243509-9-hch@lst.de Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/dax/super.c36
-rw-r--r--drivers/md/dm-table.c22
-rw-r--r--drivers/md/dm.c21
-rw-r--r--drivers/md/dm.h4
-rw-r--r--drivers/nvdimm/pmem.c1
-rw-r--r--drivers/s390/block/dcssblk.c1
6 files changed, 11 insertions, 74 deletions
diff --git a/drivers/dax/super.c b/drivers/dax/super.c
index f2cef47bdeaf..90b5733f5a70 100644
--- a/drivers/dax/super.c
+++ b/drivers/dax/super.c
@@ -107,42 +107,6 @@ struct dax_device *fs_dax_get_by_bdev(struct block_device *bdev)
return dax_dev;
}
EXPORT_SYMBOL_GPL(fs_dax_get_by_bdev);
-
-bool generic_fsdax_supported(struct dax_device *dax_dev,
- struct block_device *bdev, int blocksize, sector_t start,
- sector_t sectors)
-{
- if (blocksize != PAGE_SIZE) {
- pr_info("%pg: error: unsupported blocksize for dax\n", bdev);
- return false;
- }
-
- if (!dax_dev) {
- pr_debug("%pg: error: dax unsupported by block device\n", bdev);
- return false;
- }
-
- return true;
-}
-EXPORT_SYMBOL_GPL(generic_fsdax_supported);
-
-bool dax_supported(struct dax_device *dax_dev, struct block_device *bdev,
- int blocksize, sector_t start, sector_t len)
-{
- bool ret = false;
- int id;
-
- if (!dax_dev)
- return false;
-
- id = dax_read_lock();
- if (dax_alive(dax_dev) && dax_dev->ops->dax_supported)
- ret = dax_dev->ops->dax_supported(dax_dev, bdev, blocksize,
- start, len);
- dax_read_unlock(id);
- return ret;
-}
-EXPORT_SYMBOL_GPL(dax_supported);
#endif /* CONFIG_BLOCK && CONFIG_FS_DAX */
enum dax_device_flags {
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index aa173f5bdc3d..e43096cfe9e2 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -806,12 +806,14 @@ void dm_table_set_type(struct dm_table *t, enum dm_queue_mode type)
EXPORT_SYMBOL_GPL(dm_table_set_type);
/* validate the dax capability of the target device span */
-int device_not_dax_capable(struct dm_target *ti, struct dm_dev *dev,
+static int device_not_dax_capable(struct dm_target *ti, struct dm_dev *dev,
sector_t start, sector_t len, void *data)
{
- int blocksize = *(int *) data;
+ if (dev->dax_dev)
+ return false;
- return !dax_supported(dev->dax_dev, dev->bdev, blocksize, start, len);
+ DMDEBUG("%pg: error: dax unsupported by block device", dev->bdev);
+ return true;
}
/* Check devices support synchronous DAX */
@@ -821,8 +823,8 @@ static int device_not_dax_synchronous_capable(struct dm_target *ti, struct dm_de
return !dev->dax_dev || !dax_synchronous(dev->dax_dev);
}
-bool dm_table_supports_dax(struct dm_table *t,
- iterate_devices_callout_fn iterate_fn, int *blocksize)
+static bool dm_table_supports_dax(struct dm_table *t,
+ iterate_devices_callout_fn iterate_fn)
{
struct dm_target *ti;
unsigned i;
@@ -835,7 +837,7 @@ bool dm_table_supports_dax(struct dm_table *t,
return false;
if (!ti->type->iterate_devices ||
- ti->type->iterate_devices(ti, iterate_fn, blocksize))
+ ti->type->iterate_devices(ti, iterate_fn, NULL))
return false;
}
@@ -862,7 +864,6 @@ static int dm_table_determine_type(struct dm_table *t)
struct dm_target *tgt;
struct list_head *devices = dm_table_get_devices(t);
enum dm_queue_mode live_md_type = dm_get_md_type(t->md);
- int page_size = PAGE_SIZE;
if (t->type != DM_TYPE_NONE) {
/* target already set the table's type */
@@ -906,7 +907,7 @@ static int dm_table_determine_type(struct dm_table *t)
verify_bio_based:
/* We must use this table as bio-based */
t->type = DM_TYPE_BIO_BASED;
- if (dm_table_supports_dax(t, device_not_dax_capable, &page_size) ||
+ if (dm_table_supports_dax(t, device_not_dax_capable) ||
(list_empty(devices) && live_md_type == DM_TYPE_DAX_BIO_BASED)) {
t->type = DM_TYPE_DAX_BIO_BASED;
}
@@ -1976,7 +1977,6 @@ int dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
struct queue_limits *limits)
{
bool wc = false, fua = false;
- int page_size = PAGE_SIZE;
int r;
/*
@@ -2010,9 +2010,9 @@ int dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
}
blk_queue_write_cache(q, wc, fua);
- if (dm_table_supports_dax(t, device_not_dax_capable, &page_size)) {
+ if (dm_table_supports_dax(t, device_not_dax_capable)) {
blk_queue_flag_set(QUEUE_FLAG_DAX, q);
- if (dm_table_supports_dax(t, device_not_dax_synchronous_capable, NULL))
+ if (dm_table_supports_dax(t, device_not_dax_synchronous_capable))
set_dax_synchronous(t->md->dax_dev);
}
else
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index a8c650276b32..4eba27e75c23 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1027,26 +1027,6 @@ static long dm_dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff,
return ret;
}
-static bool dm_dax_supported(struct dax_device *dax_dev, struct block_device *bdev,
- int blocksize, sector_t start, sector_t len)
-{
- struct mapped_device *md = dax_get_private(dax_dev);
- struct dm_table *map;
- bool ret = false;
- int srcu_idx;
-
- map = dm_get_live_table(md, &srcu_idx);
- if (!map)
- goto out;
-
- ret = dm_table_supports_dax(map, device_not_dax_capable, &blocksize);
-
-out:
- dm_put_live_table(md, srcu_idx);
-
- return ret;
-}
-
static size_t dm_dax_copy_from_iter(struct dax_device *dax_dev, pgoff_t pgoff,
void *addr, size_t bytes, struct iov_iter *i)
{
@@ -3044,7 +3024,6 @@ static const struct block_device_operations dm_rq_blk_dops = {
static const struct dax_operations dm_dax_ops = {
.direct_access = dm_dax_direct_access,
- .dax_supported = dm_dax_supported,
.copy_from_iter = dm_dax_copy_from_iter,
.copy_to_iter = dm_dax_copy_to_iter,
.zero_page_range = dm_dax_zero_page_range,
diff --git a/drivers/md/dm.h b/drivers/md/dm.h
index 742d9c80efe1..9013dc1a7b00 100644
--- a/drivers/md/dm.h
+++ b/drivers/md/dm.h
@@ -73,10 +73,6 @@ bool dm_table_bio_based(struct dm_table *t);
bool dm_table_request_based(struct dm_table *t);
void dm_table_free_md_mempools(struct dm_table *t);
struct dm_md_mempools *dm_table_get_md_mempools(struct dm_table *t);
-bool dm_table_supports_dax(struct dm_table *t, iterate_devices_callout_fn fn,
- int *blocksize);
-int device_not_dax_capable(struct dm_target *ti, struct dm_dev *dev,
- sector_t start, sector_t len, void *data);
void dm_lock_md_type(struct mapped_device *md);
void dm_unlock_md_type(struct mapped_device *md);
diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
index 1018f0d44acb..4190c8c46ca8 100644
--- a/drivers/nvdimm/pmem.c
+++ b/drivers/nvdimm/pmem.c
@@ -321,7 +321,6 @@ static size_t pmem_copy_to_iter(struct dax_device *dax_dev, pgoff_t pgoff,
static const struct dax_operations pmem_dax_ops = {
.direct_access = pmem_dax_direct_access,
- .dax_supported = generic_fsdax_supported,
.copy_from_iter = pmem_copy_from_iter,
.copy_to_iter = pmem_copy_to_iter,
.zero_page_range = pmem_dax_zero_page_range,
diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c
index 657e492f2bc2..e65e83764d1c 100644
--- a/drivers/s390/block/dcssblk.c
+++ b/drivers/s390/block/dcssblk.c
@@ -72,7 +72,6 @@ static int dcssblk_dax_zero_page_range(struct dax_device *dax_dev,
static const struct dax_operations dcssblk_dax_ops = {
.direct_access = dcssblk_dax_direct_access,
- .dax_supported = generic_fsdax_supported,
.copy_from_iter = dcssblk_dax_copy_from_iter,
.copy_to_iter = dcssblk_dax_copy_to_iter,
.zero_page_range = dcssblk_dax_zero_page_range,