Eliminate the DM_TARGET_SUPPORTS_DISCARDS feature flag now that dm_target's 'num_discard_requests' provides the mechanism to enable discards on a per target basis. Signed-off-by: Mike Snitzer <snitzer@xxxxxxxxxx> --- drivers/md/dm-linear.c | 1 - drivers/md/dm-table.c | 2 +- drivers/md/dm.c | 2 +- include/linux/device-mapper.h | 1 - 4 files changed, 2 insertions(+), 4 deletions(-) Index: linux-2.6-block/drivers/md/dm-linear.c =================================================================== --- linux-2.6-block.orig/drivers/md/dm-linear.c +++ linux-2.6-block/drivers/md/dm-linear.c @@ -153,7 +153,6 @@ static struct target_type linear_target .ioctl = linear_ioctl, .merge = linear_merge, .iterate_devices = linear_iterate_devices, - .features = DM_TARGET_SUPPORTS_DISCARDS, }; int __init dm_linear_init(void) Index: linux-2.6-block/drivers/md/dm-table.c =================================================================== --- linux-2.6-block.orig/drivers/md/dm-table.c +++ linux-2.6-block/drivers/md/dm-table.c @@ -773,7 +773,7 @@ int dm_table_add_target(struct dm_table t->highs[t->num_targets++] = tgt->begin + tgt->len - 1; - if (!(tgt->type->features & DM_TARGET_SUPPORTS_DISCARDS)) + if (!tgt->num_discard_requests) t->discards_supported = 0; return 0; Index: linux-2.6-block/drivers/md/dm.c =================================================================== --- linux-2.6-block.orig/drivers/md/dm.c +++ linux-2.6-block/drivers/md/dm.c @@ -1242,7 +1242,7 @@ static int __clone_and_map_discard(struc * check was performed. */ - if (!(ti->type->features & DM_TARGET_SUPPORTS_DISCARDS)) + if (!ti->num_discard_requests) return -EOPNOTSUPP; max = max_io_len(ci->md, ci->sector, ti); Index: linux-2.6-block/include/linux/device-mapper.h =================================================================== --- linux-2.6-block.orig/include/linux/device-mapper.h +++ linux-2.6-block/include/linux/device-mapper.h @@ -130,7 +130,6 @@ void dm_put_device(struct dm_target *ti, /* * Target features */ -#define DM_TARGET_SUPPORTS_DISCARDS 0x00000001 struct target_type { uint64_t features; -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel