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authorDan Williams <dan.j.williams@intel.com>2022-01-31 11:50:09 -0800
committerDan Williams <dan.j.williams@intel.com>2022-02-08 22:57:29 -0800
commit3c5b903955251ea464fca383a42d981e33004df6 (patch)
treec4ff8665db9ad785d73be3a5ec462964e2148b86 /drivers/nvdimm
parent53fa1bff3426344d466d91e81f076eab677d0ece (diff)
cxl: Prove CXL locking
When CONFIG_PROVE_LOCKING is enabled the 'struct device' definition gets an additional mutex that is not clobbered by lockdep_set_novalidate_class() like the typical device_lock(). This allows for local annotation of subsystem locks with mutex_lock_nested() per the subsystem's object/lock hierarchy. For CXL, this primarily needs the ability to lock ports by depth and child objects of ports by their parent parent-port lock. Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Reviewed-by: Ben Widawsky <ben.widawsky@intel.com> Link: https://lore.kernel.org/r/164365853422.99383.1052399160445197427.stgit@dwillia2-desk3.amr.corp.intel.com Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm')
-rw-r--r--drivers/nvdimm/nd-core.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/nvdimm/nd-core.h b/drivers/nvdimm/nd-core.h
index a11850dd475d..2650a852eeaf 100644
--- a/drivers/nvdimm/nd-core.h
+++ b/drivers/nvdimm/nd-core.h
@@ -185,7 +185,7 @@ static inline void devm_nsio_disable(struct device *dev,
}
#endif
-#ifdef CONFIG_PROVE_LOCKING
+#ifdef CONFIG_PROVE_NVDIMM_LOCKING
extern struct class *nd_class;
enum {