FROMLIST: mm: add filemap_fdatawait_range_keep_errors()

In the spirit of filemap_fdatawait_range() and
filemap_fdatawait_keep_errors(), introduce
filemap_fdatawait_range_keep_errors() which both takes a range upon
which to wait and does not clear errors from the address space.

Signed-off-by: Ross Zwisler <zwisler@google.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: stable@vger.kernel.org

BUG=b:130521177, chromium:959968, b:133470926, b:65528573
TEST=Multiple iteration of dd from /dev/zero to /mnt/stateful_partition,
filling the disk.  Also, copied multi-GiB files from USB sticks to the
Downloads folder via the GUI.  I did this on bobba, sarien and
samus-kernelnext.

(am from https://patchwork.kernel.org/patch/11007131/)
Change-Id: If1baeca0eade2ca0bd40f1397e533df43cc2e399
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/1669279


Tested-by: Ross Zwisler <zwisler@google.com>
Legacy-Commit-Queue: Commit Bot <commit-bot@chromium.org>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Reviewed-by: Guenter Roeck <groeck@chromium.org>
(cherry picked from commit 00bf5d5f6e7df41865d9e761bd32cf7b06fbabf0)
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/1775619


Reviewed-by: Zhihong Yu <zhihongyu@chromium.org>
Commit-Queue: Zhihong Yu <zhihongyu@chromium.org>
Tested-by: Zhihong Yu <zhihongyu@chromium.org>