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authorDan Williams <dan.j.williams@intel.com>2017-06-27 13:06:22 -0700
committerDan Williams <dan.j.williams@intel.com>2017-06-27 16:44:27 -0700
commit5d61e43b3975c0582003329d9de9d5e85abf5d33 (patch)
tree259546b1a8fd2b8cf50d40698edfaeebdb241e00 /include/linux/dax.h
parentc9e582aa689f5418ca30e1e7a975039772c3a757 (diff)
dax: remove default copy_from_iter fallback
Require all dax-drivers to register a ->copy_from_iter() operation so that it is clear which dax_operations are optional and which must be implemented for filesystem-dax to operate. Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com> Suggested-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'include/linux/dax.h')
-rw-r--r--include/linux/dax.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/dax.h b/include/linux/dax.h
index 1f6b6072af64..73fca1bebaf3 100644
--- a/include/linux/dax.h
+++ b/include/linux/dax.h
@@ -16,7 +16,7 @@ struct dax_operations {
*/
long (*direct_access)(struct dax_device *, pgoff_t, long,
void **, pfn_t *);
- /* copy_from_iter: dax-driver override for default copy_from_iter */
+ /* copy_from_iter: required operation for fs-dax direct-i/o */
size_t (*copy_from_iter)(struct dax_device *, pgoff_t, void *, size_t,
struct iov_iter *);
/* flush: optional driver-specific cache management after writes */