diff options
| author | Christoph Hellwig <hch@lst.de> | 2021-12-15 09:45:08 +0100 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2021-12-18 08:04:53 -0800 |
| commit | 7ac5360cd4d02cc7e0eaf10867f599e041822f12 (patch) | |
| tree | 995133c39f548b5ce8f01cc3a72f15d85838a630 /include/linux/device-mapper.h | |
| parent | 30c6828a17a572aeb9e3a3bacce05fdcf1106541 (diff) | |
dax: remove the copy_from_iter and copy_to_iter methods
These methods indirect the actual DAX read/write path. In the end pmem
uses magic flush and mc safe variants and fuse and dcssblk use plain ones
while device mapper picks redirects to the underlying device.
Add set_dax_nocache() and set_dax_nomc() APIs to control which copy
routines are used to remove indirect call from the read/write fast path
as well as a lot of boilerplate code.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Vivek Goyal <vgoyal@redhat.com> [virtiofs]
Link: https://lore.kernel.org/r/20211215084508.435401-5-hch@lst.de
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'include/linux/device-mapper.h')
| -rw-r--r-- | include/linux/device-mapper.h | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h index a7df155ea49b..b26fecf6c8e8 100644 --- a/include/linux/device-mapper.h +++ b/include/linux/device-mapper.h @@ -147,8 +147,6 @@ typedef int (*dm_busy_fn) (struct dm_target *ti); */ typedef long (*dm_dax_direct_access_fn) (struct dm_target *ti, pgoff_t pgoff, long nr_pages, void **kaddr, pfn_t *pfn); -typedef size_t (*dm_dax_copy_iter_fn)(struct dm_target *ti, pgoff_t pgoff, - void *addr, size_t bytes, struct iov_iter *i); typedef int (*dm_dax_zero_page_range_fn)(struct dm_target *ti, pgoff_t pgoff, size_t nr_pages); @@ -200,8 +198,6 @@ struct target_type { dm_iterate_devices_fn iterate_devices; dm_io_hints_fn io_hints; dm_dax_direct_access_fn direct_access; - dm_dax_copy_iter_fn dax_copy_from_iter; - dm_dax_copy_iter_fn dax_copy_to_iter; dm_dax_zero_page_range_fn dax_zero_page_range; /* For internal device-mapper use. */ |