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authorChristoph Hellwig <hch@lst.de>2022-04-15 07:52:55 +0300
committerJens Axboe <axboe@kernel.dk>2022-04-18 04:49:59 +0300
commit70200574cc229f6ba038259e8142af2aa09e6976 (patch)
tree07398810532d1e075f413bb4771d7b90b40b1226 /drivers/block/xen-blkback
parentcf0fbf894bb543f472f682c486be48298eccf199 (diff)
downloadlinux-70200574cc229f6ba038259e8142af2aa09e6976.tar.xz
block: remove QUEUE_FLAG_DISCARD
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@lst.de> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Acked-by: Christoph Böhmwalder <christoph.boehmwalder@linbit.com> [drbd] Acked-by: Jan Höppner <hoeppner@linux.ibm.com> [s390] Acked-by: Coly Li <colyli@suse.de> [bcache] Acked-by: David Sterba <dsterba@suse.com> [btrfs] Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Link: https://lore.kernel.org/r/20220415045258.199825-25-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/block/xen-blkback')
-rw-r--r--drivers/block/xen-blkback/xenbus.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/block/xen-blkback/xenbus.c b/drivers/block/xen-blkback/xenbus.c
index 8b691fe50475..83cd08041e6b 100644
--- a/drivers/block/xen-blkback/xenbus.c
+++ b/drivers/block/xen-blkback/xenbus.c
@@ -583,7 +583,7 @@ static void xen_blkbk_discard(struct xenbus_transaction xbt, struct backend_info
if (!xenbus_read_unsigned(dev->nodename, "discard-enable", 1))
return;
- if (blk_queue_discard(q)) {
+ if (bdev_max_discard_sectors(bdev)) {
err = xenbus_printf(xbt, dev->nodename,
"discard-granularity", "%u",
q->limits.discard_granularity);