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| author | Toshi Kani <toshi.kani@hpe.com> | 2016-06-23 23:05:50 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2016-07-21 05:01:01 +0200 |
| commit | 163d4baaebe39c0e56d9c08597eab7b3ae0bf334 (patch) | |
| tree | a2874ed41e21f5163e45e6fbb177d94b13cb38ff /drivers/nvdimm/pmem.c | |
| parent | Btrfs: fix comparison in __btrfs_map_block() (diff) | |
| download | linux-163d4baaebe39c0e56d9c08597eab7b3ae0bf334.tar.xz linux-163d4baaebe39c0e56d9c08597eab7b3ae0bf334.zip | |
block: add QUEUE_FLAG_DAX for devices to advertise their DAX support
Currently, presence of direct_access() in block_device_operations
indicates support of DAX on its block device. Because
block_device_operations is instantiated with 'const', this DAX
capablity may not be enabled conditinally.
In preparation for supporting DAX to device-mapper devices, add
QUEUE_FLAG_DAX to request_queue flags to advertise their DAX
support. This will allow to set the DAX capability based on how
mapped device is composed.
Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: <linux-s390@vger.kernel.org>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/nvdimm/pmem.c')
| -rw-r--r-- | drivers/nvdimm/pmem.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c index 608fc4464574..53b701b2f73e 100644 --- a/drivers/nvdimm/pmem.c +++ b/drivers/nvdimm/pmem.c @@ -283,6 +283,7 @@ static int pmem_attach_disk(struct device *dev, blk_queue_max_hw_sectors(q, UINT_MAX); blk_queue_bounce_limit(q, BLK_BOUNCE_ANY); queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q); + queue_flag_set_unlocked(QUEUE_FLAG_DAX, q); q->queuedata = pmem; disk = alloc_disk_node(0, nid); |