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authorChristoph Hellwig <hch@lst.de>2021-12-15 09:45:08 +0100
committerDan Williams <dan.j.williams@intel.com>2021-12-18 08:04:53 -0800
commit7ac5360cd4d02cc7e0eaf10867f599e041822f12 (patch)
tree995133c39f548b5ce8f01cc3a72f15d85838a630 /fs/fuse
parent30c6828a17a572aeb9e3a3bacce05fdcf1106541 (diff)
downloadlinux-7ac5360cd4d02cc7e0eaf10867f599e041822f12.tar.bz2
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 'fs/fuse')
-rw-r--r--fs/fuse/virtio_fs.c16
1 files changed, 0 insertions, 16 deletions
diff --git a/fs/fuse/virtio_fs.c b/fs/fuse/virtio_fs.c
index 5c03a0364a9b..3928cd8ceba6 100644
--- a/fs/fuse/virtio_fs.c
+++ b/fs/fuse/virtio_fs.c
@@ -753,20 +753,6 @@ static long virtio_fs_direct_access(struct dax_device *dax_dev, pgoff_t pgoff,
return nr_pages > max_nr_pages ? max_nr_pages : nr_pages;
}
-static size_t virtio_fs_copy_from_iter(struct dax_device *dax_dev,
- pgoff_t pgoff, void *addr,
- size_t bytes, struct iov_iter *i)
-{
- return copy_from_iter(addr, bytes, i);
-}
-
-static size_t virtio_fs_copy_to_iter(struct dax_device *dax_dev,
- pgoff_t pgoff, void *addr,
- size_t bytes, struct iov_iter *i)
-{
- return copy_to_iter(addr, bytes, i);
-}
-
static int virtio_fs_zero_page_range(struct dax_device *dax_dev,
pgoff_t pgoff, size_t nr_pages)
{
@@ -783,8 +769,6 @@ static int virtio_fs_zero_page_range(struct dax_device *dax_dev,
static const struct dax_operations virtio_fs_dax_ops = {
.direct_access = virtio_fs_direct_access,
- .copy_from_iter = virtio_fs_copy_from_iter,
- .copy_to_iter = virtio_fs_copy_to_iter,
.zero_page_range = virtio_fs_zero_page_range,
};