Re: [PATCH v3 1/3] pmem: only set QUEUE_FLAG_DAX for fsdax mode

On Tue, Jun 26, 2018 at 10:59 AM, Ross Zwisler ross.zwisler@linux.intel.com wrote:

QUEUE_FLAG_DAX is an indication that a given block device supports filesystem DAX and should not be set for PMEM namespaces which are in "raw" or "sector" modes. These namespaces lack struct page and are prevented from participating in filesystem DAX.

Signed-off-by: Ross Zwisler ross.zwisler@linux.intel.com Suggested-by: Mike Snitzer snitzer@redhat.com Cc: stable@vger.kernel.org

Why is this cc: stable? What is the user visible impact of this change especially given the requirement to validate QUEUE_FLAG_DAX with bdev_dax_supported()? Patch looks good, but it's just a cosmetic fixup afaics.