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| author | Dan Williams <dan.j.williams@intel.com> | 2017-06-27 13:06:22 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2017-06-27 16:44:27 -0700 |
| commit | 5d61e43b3975c0582003329d9de9d5e85abf5d33 (patch) | |
| tree | 259546b1a8fd2b8cf50d40698edfaeebdb241e00 /drivers/block/brd.c | |
| parent | c9e582aa689f5418ca30e1e7a975039772c3a757 (diff) | |
| download | lwn-5d61e43b3975c0582003329d9de9d5e85abf5d33.tar.gz lwn-5d61e43b3975c0582003329d9de9d5e85abf5d33.zip | |
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 'drivers/block/brd.c')
| -rw-r--r-- | drivers/block/brd.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/block/brd.c b/drivers/block/brd.c index 57b574f2f66a..f2a7ac350f6a 100644 --- a/drivers/block/brd.c +++ b/drivers/block/brd.c @@ -22,6 +22,7 @@ #ifdef CONFIG_BLK_DEV_RAM_DAX #include <linux/pfn_t.h> #include <linux/dax.h> +#include <linux/uio.h> #endif #include <linux/uaccess.h> @@ -354,8 +355,15 @@ static long brd_dax_direct_access(struct dax_device *dax_dev, return __brd_direct_access(brd, pgoff, nr_pages, kaddr, pfn); } +static size_t brd_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 const struct dax_operations brd_dax_ops = { .direct_access = brd_dax_direct_access, + .copy_from_iter = brd_dax_copy_from_iter, }; #endif |