add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/md/dm.h
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@@ -63,16 +63,18 @@
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 void dm_table_presuspend_undo_targets(struct dm_table *t);
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 void dm_table_postsuspend_targets(struct dm_table *t);
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 int dm_table_resume_targets(struct dm_table *t);
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-int dm_table_any_congested(struct dm_table *t, int bdi_bits);
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 enum dm_queue_mode dm_table_get_type(struct dm_table *t);
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 struct target_type *dm_table_get_immutable_target_type(struct dm_table *t);
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 struct dm_target *dm_table_get_immutable_target(struct dm_table *t);
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 struct dm_target *dm_table_get_wildcard_target(struct dm_table *t);
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 bool dm_table_bio_based(struct dm_table *t);
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 bool dm_table_request_based(struct dm_table *t);
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-bool dm_table_all_blk_mq_devices(struct dm_table *t);
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 void dm_table_free_md_mempools(struct dm_table *t);
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 struct dm_md_mempools *dm_table_get_md_mempools(struct dm_table *t);
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+bool dm_table_supports_dax(struct dm_table *t, iterate_devices_callout_fn fn,
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+			   int *blocksize);
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+int device_not_dax_capable(struct dm_target *ti, struct dm_dev *dev,
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+			   sector_t start, sector_t len, void *data);
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 void dm_lock_md_type(struct mapped_device *md);
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 void dm_unlock_md_type(struct mapped_device *md);
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@@ -81,11 +83,6 @@
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 struct target_type *dm_get_immutable_target_type(struct mapped_device *md);
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 int dm_setup_md_queue(struct mapped_device *md, struct dm_table *t);
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-
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-/*
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- * To check the return value from dm_table_find_target().
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- */
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-#define dm_target_is_valid(t) ((t)->table)
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 /*
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  * To check whether the target type is bio-based or not (request-based).
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@@ -182,12 +179,9 @@
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 int dm_lock_for_deletion(struct mapped_device *md, bool mark_deferred, bool only_deferred);
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 int dm_cancel_deferred_remove(struct mapped_device *md);
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 int dm_request_based(struct mapped_device *md);
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-sector_t dm_get_size(struct mapped_device *md);
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-struct request_queue *dm_get_md_queue(struct mapped_device *md);
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 int dm_get_table_device(struct mapped_device *md, dev_t dev, fmode_t mode,
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 			struct dm_dev **result);
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 void dm_put_table_device(struct mapped_device *md, struct dm_dev *d);
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-struct dm_stats *dm_get_stats(struct mapped_device *md);
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 int dm_kobject_uevent(struct mapped_device *md, enum kobject_action action,
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 		      unsigned cookie);