releases/4.14.60/f2fs-fix-to-wait-page-writeback-during-revoking-atomic-write.patch

   1 From foo@baz Sat Jul 28 10:25:26 CEST 2018
   2 From: Chao Yu <yuchao0@huawei.com>
   3 Date: Mon, 23 Apr 2018 10:36:13 +0800
   4 Subject: f2fs: fix to wait page writeback during revoking atomic write
   5
   6 From: Chao Yu <yuchao0@huawei.com>
   7
   8 [ Upstream commit e5e5732d8120654159254c16834bc8663d8be124 ]
   9
  10 After revoking atomic write, related LBA can be reused by others, so we
  11 need to wait page writeback before reusing the LBA, in order to avoid
  12 interference between old atomic written in-flight IO and new IO.
  13
  14 Signed-off-by: Chao Yu <yuchao0@huawei.com>
  15 Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
  16 Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
  17 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  18 ---
  19  fs/f2fs/segment.c |    2 ++
  20  1 file changed, 2 insertions(+)
  21
  22 --- a/fs/f2fs/segment.c
  23 +++ b/fs/f2fs/segment.c
  24 @@ -225,6 +225,8 @@ static int __revoke_inmem_pages(struct i
  25
  26                 lock_page(page);
  27
  28 +               f2fs_wait_on_page_writeback(page, DATA, true);
  29 +
  30                 if (recover) {
  31                         struct dnode_of_data dn;
  32                         struct node_info ni;