Re: [Linux-nvdimm] [PATCH 19/21] nd: infrastructure for btt devices

[Matthew Wilcox]

On Tue, Apr 28, 2015 at 06:01:04AM -0700, Christoph Hellwig wrote:
> Please don't add any of the nd-specific hacks into the pmem driver.
> The rw_bytes functionality already is provided by the existing block
> level ->rw_page method which pmem already implements, and any sort
> of bus locking for different access methods should be in the bus
> glue, not in pmem.c

->rw_page only lets you do an entire page, not a range of bytes within
a page.
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