From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:40525 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932092AbbJMVuG (ORCPT ); Tue, 13 Oct 2015 17:50:06 -0400 Subject: Patch "pmem: add proper fencing to pmem_rw_page()" has been added to the 4.2-stable tree To: ross.zwisler@linux.intel.com, dan.j.williams@intel.com, gregkh@linuxfoundation.org Cc: , From: Date: Tue, 13 Oct 2015 14:49:59 -0700 Message-ID: <144477299919114@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled pmem: add proper fencing to pmem_rw_page() to the 4.2-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: pmem-add-proper-fencing-to-pmem_rw_page.patch and it can be found in the queue-4.2 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From ba8fe0f85e15d047686caf8a42463b592c63c98c Mon Sep 17 00:00:00 2001 From: Ross Zwisler Date: Wed, 16 Sep 2015 14:52:21 -0600 Subject: pmem: add proper fencing to pmem_rw_page() From: Ross Zwisler commit ba8fe0f85e15d047686caf8a42463b592c63c98c upstream. 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 61031952f4c8 ("arch, x86: pmem api for ensuring durability of persistent memory updates") ...the pmem_rw_page() path was missed. Signed-off-by: Ross Zwisler Signed-off-by: Dan Williams Signed-off-by: Greg Kroah-Hartman --- drivers/nvdimm/pmem.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/nvdimm/pmem.c +++ b/drivers/nvdimm/pmem.c @@ -86,6 +86,8 @@ static int pmem_rw_page(struct block_dev 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; Patches currently in stable-queue which might be from ross.zwisler@linux.intel.com are queue-4.2/pmem-add-proper-fencing-to-pmem_rw_page.patch