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| author | Christoph Hellwig <hch@lst.de> | 2022-04-15 06:52:55 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-04-17 19:49:59 -0600 |
| commit | 70200574cc229f6ba038259e8142af2aa09e6976 (patch) | |
| tree | 07398810532d1e075f413bb4771d7b90b40b1226 /drivers/md/dm-cache-target.c | |
| parent | cf0fbf894bb543f472f682c486be48298eccf199 (diff) | |
| download | linux-70200574cc229f6ba038259e8142af2aa09e6976.tar.bz2 | |
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/md/dm-cache-target.c')
| -rw-r--r-- | drivers/md/dm-cache-target.c | 9 |
1 files changed, 1 insertions, 8 deletions
diff --git a/drivers/md/dm-cache-target.c b/drivers/md/dm-cache-target.c index 780a61bc6cc0..28c5de8eca4a 100644 --- a/drivers/md/dm-cache-target.c +++ b/drivers/md/dm-cache-target.c @@ -3329,13 +3329,6 @@ static int cache_iterate_devices(struct dm_target *ti, return r; } -static bool origin_dev_supports_discard(struct block_device *origin_bdev) -{ - struct request_queue *q = bdev_get_queue(origin_bdev); - - return blk_queue_discard(q); -} - /* * If discard_passdown was enabled verify that the origin device * supports discards. Disable discard_passdown if not. @@ -3349,7 +3342,7 @@ static void disable_passdown_if_not_supported(struct cache *cache) if (!cache->features.discard_passdown) return; - if (!origin_dev_supports_discard(origin_bdev)) + if (!bdev_max_discard_sectors(origin_bdev)) reason = "discard unsupported"; else if (origin_limits->max_discard_sectors < cache->sectors_per_block) |