On Sat, Apr 09, 2022 at 06:50:40AM +0200, 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> > Reviewed-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx> > Acked-by: Christoph Böhmwalder <christoph.boehmwalder@xxxxxxxxxx> [btrfs] > Acked-by: Coly Li <colyli@xxxxxxx> [bcache] > --- > arch/um/drivers/ubd_kern.c | 2 -- > block/blk-core.c | 2 +- > block/blk-lib.c | 2 +- > block/blk-mq-debugfs.c | 1 - > block/ioctl.c | 3 +-- > drivers/block/drbd/drbd_main.c | 2 +- > drivers/block/drbd/drbd_nl.c | 19 ++----------------- > drivers/block/drbd/drbd_receiver.c | 3 +-- > drivers/block/loop.c | 11 +++-------- > drivers/block/nbd.c | 5 +---- > drivers/block/null_blk/main.c | 1 - > drivers/block/rbd.c | 1 - > drivers/block/rnbd/rnbd-clt.c | 2 -- > drivers/block/rnbd/rnbd-srv-dev.h | 3 --- > drivers/block/virtio_blk.c | 2 -- > drivers/block/xen-blkback/xenbus.c | 2 +- > drivers/block/xen-blkfront.c | 2 -- > drivers/block/zram/zram_drv.c | 1 - > drivers/md/bcache/request.c | 4 ++-- > drivers/md/bcache/super.c | 3 +-- > drivers/md/bcache/sysfs.c | 2 +- > drivers/md/dm-cache-target.c | 9 +-------- > drivers/md/dm-clone-target.c | 9 +-------- > drivers/md/dm-log-writes.c | 3 +-- > drivers/md/dm-raid.c | 9 ++------- > drivers/md/dm-table.c | 9 ++------- > drivers/md/dm-thin.c | 11 +---------- > drivers/md/dm.c | 3 +-- > drivers/md/md-linear.c | 11 +---------- > drivers/md/raid0.c | 7 ------- > drivers/md/raid1.c | 16 +--------------- > drivers/md/raid10.c | 18 ++---------------- > drivers/md/raid5-cache.c | 2 +- > 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 -- > drivers/target/target_core_device.c | 2 +- For > fs/btrfs/extent-tree.c | 4 ++-- > fs/btrfs/ioctl.c | 2 +- Acked-by: David Sterba <dsterba@xxxxxxxx>
