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| author | Dan Williams <dan.j.williams@intel.com> | 2018-05-02 06:46:33 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2018-05-22 23:18:31 -0700 |
| commit | b3a9a0c36e1f7b9e2e6cf965c2bb973624f2b3b9 (patch) | |
| tree | 54f43a8720a29159310b112cf21e7d3a3b5dce85 /fs/dax.c | |
| parent | 522239b445a2de988edb81672963708a6aaf9046 (diff) | |
| download | linux-stable-b3a9a0c36e1f7b9e2e6cf965c2bb973624f2b3b9.tar.gz linux-stable-b3a9a0c36e1f7b9e2e6cf965c2bb973624f2b3b9.tar.bz2 linux-stable-b3a9a0c36e1f7b9e2e6cf965c2bb973624f2b3b9.zip | |
dax: Introduce a ->copy_to_iter dax operation
Similar to the ->copy_from_iter() operation, a platform may want to
deploy an architecture or device specific routine for handling reads
from a dax_device like /dev/pmemX. On x86 this routine will point to a
machine check safe version of copy_to_iter(). For now, add the plumbing
to device-mapper and the dax core.
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Mike Snitzer <snitzer@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'fs/dax.c')
| -rw-r--r-- | fs/dax.c | 3 |
1 files changed, 2 insertions, 1 deletions
@@ -1057,7 +1057,8 @@ dax_iomap_actor(struct inode *inode, loff_t pos, loff_t length, void *data, map_len = dax_copy_from_iter(dax_dev, pgoff, kaddr, map_len, iter); else - map_len = copy_to_iter(kaddr, map_len, iter); + map_len = dax_copy_to_iter(dax_dev, pgoff, kaddr, + map_len, iter); if (map_len <= 0) { ret = map_len ? map_len : -EFAULT; break; |