diff options
| author | Vishal Verma <vishal.l.verma@intel.com> | 2024-04-30 11:44:24 -0600 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-05-07 10:37:00 -0700 |
| commit | 6f6544f27e41f9d7dca55c288f12175a9c48dfe2 (patch) | |
| tree | df0e1c6557cbc3c052cbd82726dc5f996fc16347 /tools/perf/scripts/python/syscall-counts.py | |
| parent | c14c647bbe23fd96f6bffcc122b9c6c8c46c7928 (diff) | |
dax/bus.c: fix locking for unregister_dax_dev / unregister_dax_mapping paths
Commit c05ae9d85b47 ("dax/bus.c: replace driver-core lock usage by a local
rwsem") aimed to undo device_lock() abuses for protecting changes to
dax-driver internal data-structures like the dax_region resource tree to
device-dax-instance range structures. However, the device_lock() was
legitimately enforcing that devices to be deleted were not current
actively attached to any driver nor assigned any capacity from the region.
As a result of the device_lock restoration in delete_store(), the
conditional locking in unregister_dev_dax() and unregister_dax_mapping()
can be removed.
Link: https://lkml.kernel.org/r/20240430-vv-dax_abi_fixes-v3-2-e3dcd755774c@intel.com
Fixes: c05ae9d85b47 ("dax/bus.c: replace driver-core lock usage by a local rwsem")
Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
Reported-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Cc: Alison Schofield <alison.schofield@intel.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts.py')
0 files changed, 0 insertions, 0 deletions