kernel/linux.git/drivers/md/dm-log.c, branch v6.18.22

dm: replace -EEXIST with -EBUSY

2026-03-04T12:20:12+00:00

[ Upstream commit b13ef361d47f09b7aecd18e0383ecc83ff61057e ] The -EEXIST error code is reserved by the module loading infrastructure to indicate that a module is already loaded. When a module's init function returns -EEXIST, userspace tools like kmod interpret this as "module already loaded" and treat the operation as successful, returning 0 to the user even though the module initialization actually failed. This follows the precedent set by commit 54416fd76770 ("netfilter: conntrack: helper: Replace -EEXIST by -EBUSY") which fixed the same issue in nf_conntrack_helper_register(). Affected modules: * dm_cache dm_clone dm_integrity dm_mirror dm_multipath dm_pcache * dm_vdo dm-ps-round-robin dm_historical_service_time dm_io_affinity * dm_queue_length dm_service_time dm_snapshot Signed-off-by: Daniel Gomez Signed-off-by: Mikulas Patocka Signed-off-by: Sasha Levin

dm: update relevant MODULE_AUTHOR entries to latest dm-devel mailing list

2024-02-20T19:22:55+00:00

Signed-off-by: Mike Snitzer

dm io: Support IO priority

2024-02-20T19:22:51+00:00

Some IO will dispatch from kworker with different io_context settings than the submitting task, we may need to specify a priority to avoid losing priority. Add IO priority parameter to dm_io() and update all callers. Co-developed-by: Yibin Ding Signed-off-by: Yibin Ding Signed-off-by: Hongyu Jin Reviewed-by: Eric Biggers Reviewed-by: Mikulas Patocka Signed-off-by: Mike Snitzer

dm: remove unnecessary (void*) conversions

2023-04-11T16:01:01+00:00

Pointer variables of void * type do not require type cast. Signed-off-by: Yu Zhe Signed-off-by: Mike Snitzer

dm log: avoid multiple line dereference

2023-02-14T19:23:07+00:00