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| author | Dan Williams <dan.j.williams@intel.com> | 2022-04-21 17:33:29 +0200 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2022-04-28 23:01:55 +0200 |
| commit | 4a0079bc7aae5a003ecc548090b75c96d3abf490 (patch) | |
| tree | 72c286284bdc69a6549316792598916b7882d5e2 /lib/string.c | |
| parent | cxl: Drop cxl_device_lock() (diff) | |
| download | linux-4a0079bc7aae5a003ecc548090b75c96d3abf490.tar.xz linux-4a0079bc7aae5a003ecc548090b75c96d3abf490.zip | |
nvdimm: Replace lockdep_mutex with local lock classes
In response to an attempt to expand dev->lockdep_mutex for device_lock()
validation [1], Peter points out [2] that the lockdep API already has
the ability to assign a dedicated lock class per subsystem device-type.
Use lockdep_set_class() to override the default device_lock()
'__lockdep_no_validate__' class for each NVDIMM subsystem device-type. This
enables lockdep to detect deadlocks and recursive locking within the
device-driver core and the subsystem.
Link: https://lore.kernel.org/r/164982968798.684294.15817853329823976469.stgit@dwillia2-desk3.amr.corp.intel.com [1]
Link: https://lore.kernel.org/r/Ylf0dewci8myLvoW@hirez.programming.kicks-ass.net [2]
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Link: https://lore.kernel.org/r/165055520896.3745911.8021255583475547548.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'lib/string.c')
0 files changed, 0 insertions, 0 deletions