NVMe: Configure support for block flush

This configures an nvme request_queue as flush capable if the device
has a volatile write cache present.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/nvme.h b/include/linux/nvme.h
index cfd084cab22b..6266373d3147 100644
--- a/include/linux/nvme.h
+++ b/include/linux/nvme.h
@@ -99,6 +99,7 @@ struct nvme_dev {
         u32 stripe_size;
         u16 oncs;
         u16 abort_limit;
+        u8 vwc;
         u8 initialized;
 };