Move the poll flag into the queue_limits feature field so that it can
be set atomically with the queue frozen.
Stacking drivers are simplified in that they now can simply set the
flag, and blk_stack_limits will clear it when the features is not
supported by any of the underlying devices.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
---
block/blk-core.c | 5 ++--
block/blk-mq-debugfs.c | 1 -
block/blk-mq.c | 31 +++++++++++---------
block/blk-settings.c | 10 ++++---
block/blk-sysfs.c | 4 +--
drivers/md/dm-table.c | 54 +++++++++--------------------------
drivers/nvme/host/multipath.c | 12 +-------
include/linux/blkdev.h | 4 ++-
8 files changed, 45 insertions(+), 76 deletions(-)