On 4/6/22 2:05 PM, Christoph Hellwig wrote:
Just use a non-zero max_discard_sectors as an indicator for discard
support, similar to what is done for write zeroes.
The only places where needs special attention is the RAID5 driver,
which must clear discard support for security reasons by default,
even if the default stacking rules would allow for it.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
For the bcache part,
Acked-by: Coly Li <colyli@xxxxxxx>
Thanks.
Coly Li
---
arch/um/drivers/ubd_kern.c | 2 --
block/blk-mq-debugfs.c | 1 -
drivers/block/drbd/drbd_nl.c | 15 ---------------
drivers/block/loop.c | 2 --
drivers/block/nbd.c | 3 ---
drivers/block/null_blk/main.c | 1 -
drivers/block/rbd.c | 1 -
drivers/block/rnbd/rnbd-clt.c | 2 --
drivers/block/virtio_blk.c | 2 --
drivers/block/xen-blkfront.c | 2 --
drivers/block/zram/zram_drv.c | 1 -
drivers/md/bcache/super.c | 1 -
drivers/md/dm-table.c | 5 +----
drivers/md/dm-thin.c | 2 --
drivers/md/dm.c | 1 -
drivers/md/md-linear.c | 9 ---------
drivers/md/raid0.c | 7 -------
drivers/md/raid1.c | 14 --------------
drivers/md/raid10.c | 14 --------------
drivers/md/raid5.c | 12 ++++--------
drivers/mmc/core/queue.c | 1 -
drivers/mtd/mtd_blkdevs.c | 1 -
drivers/nvme/host/core.c | 6 ++----
drivers/s390/block/dasd_fba.c | 1 -
drivers/scsi/sd.c | 2 --
include/linux/blkdev.h | 2 --
26 files changed, 7 insertions(+), 103 deletions(-)
[snipped]
diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index 296f200b2e208..2f49e31142f62 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -973,7 +973,6 @@ static int bcache_device_init(struct bcache_device *d, unsigned int block_size,
blk_queue_flag_set(QUEUE_FLAG_NONROT, d->disk->queue);
blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, d->disk->queue);
- blk_queue_flag_set(QUEUE_FLAG_DISCARD, d->disk->queue);
blk_queue_write_cache(q, true, true);
[snipped]
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