From ad9cf3bbd18a94806314741ac8092c3422f5aebe Mon Sep 17 00:00:00 2001 From: Mike Snitzer Date: Tue, 16 Dec 2014 12:54:25 -0500 Subject: [PATCH] block: mark blk-mq devices as stackable Commit 4ee5eaf4 ("block: add a queue flag for request stacking support") introduced the concept of "STACKABLE" and blk-mq devices fit the definition in that they establish q->request_fn. So establish QUEUE_FLAG_STACKABLE in QUEUE_FLAG_MQ_DEFAULT. While not strictly needed (DM _could_ just check for q->mq_ops to assume the device is request-based), request-based DM support for blk-mq devices benefits from the ability to consistently check for QUEUE_FLAG_STACKABLE before allowing a device to be stacked into a request-based DM table. Signed-off-by: Mike Snitzer Signed-off-by: Jens Axboe --- Reading git-format-patch failed