Commit ba8fe0f8 authored by Ross Zwisler's avatar Ross Zwisler Committed by Dan Williams

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: default avatarRoss Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent 4ca8b57a
...@@ -92,6 +92,8 @@ static int pmem_rw_page(struct block_device *bdev, sector_t sector, ...@@ -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; struct pmem_device *pmem = bdev->bd_disk->private_data;
pmem_do_bvec(pmem, page, PAGE_CACHE_SIZE, 0, rw, sector); pmem_do_bvec(pmem, page, PAGE_CACHE_SIZE, 0, rw, sector);
if (rw & WRITE)
wmb_pmem();
page_endio(page, rw & WRITE, 0); page_endio(page, rw & WRITE, 0);
return 0; return 0;
......
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