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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 /drivers/s390
parent30c6828a17a572aeb9e3a3bacce05fdcf1106541 (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 'drivers/s390')
-rw-r--r--drivers/s390/block/dcssblk.c14
1 files changed, 0 insertions, 14 deletions
diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c
index 10823debc09b..d614843caf6c 100644
--- a/drivers/s390/block/dcssblk.c
+++ b/drivers/s390/block/dcssblk.c
@@ -44,18 +44,6 @@ static const struct block_device_operations dcssblk_devops = {
.release = dcssblk_release,
};
-static size_t dcssblk_dax_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 dcssblk_dax_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 dcssblk_dax_zero_page_range(struct dax_device *dax_dev,
pgoff_t pgoff, size_t nr_pages)
{
@@ -72,8 +60,6 @@ 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,
- .copy_from_iter = dcssblk_dax_copy_from_iter,
- .copy_to_iter = dcssblk_dax_copy_to_iter,
.zero_page_range = dcssblk_dax_zero_page_range,
};