Commit ba8fe0f8 authored Sep 16, 2015 by Ross Zwisler Committed by Dan Williams Sep 17, 2015

pmem: add proper fencing to pmem_rw_page()



pmem_rw_page() needs to call wmb_pmem() on writes to make sure that the
newly written data is durable.  This flow was added to pmem_rw_bytes()
and pmem_make_request() with this commit:

commit 61031952 ("arch, x86: pmem api for ensuring durability of
	persistent memory updates")

...the pmem_rw_page() path was missed.

Cc: <stable@vger.kernel.org>
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

parent 4ca8b57a

drivers/nvdimm/pmem.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -92,6 +92,8 @@ static int pmem_rw_page(struct block_device *bdev, sector_t sector,
		struct pmem_device *pmem = bdev->bd_disk->private_data;

		pmem_do_bvec(pmem, page, PAGE_CACHE_SIZE, 0, rw, sector);
		if (rw & WRITE)
		wmb_pmem();
		page_endio(page, rw & WRITE, 0);

		return 0;