We do check for a bad block during namespace init and that use
region bad block list. We need to initialize the bad block
for volatile regions for this to work. We also observe a lockdep
warning as below because the lock is not initialized correctly
since we skip bad block init for volatile regions.

 INFO: trying to register non-static key.
 the code is fine but needs lockdep annotation.
 turning off the locking correctness validator.
 CPU: 2 PID: 1 Comm: swapper/0 Not tainted 5.3.0-rc1-15699-g3dee241c937e #149
 Call Trace:
 [c0000000f95cb250] [c00000000147dd84] dump_stack+0xe8/0x164 (unreliable)
 [c0000000f95cb2a0] [c00000000022ccd8] register_lock_class+0x308/0xa60
 [c0000000f95cb3a0] [c000000000229cc0] __lock_acquire+0x170/0x1ff0
 [c0000000f95cb4c0] [c00000000022c740] lock_acquire+0x220/0x270
 [c0000000f95cb580] [c000000000a93230] badblocks_check+0xc0/0x290
 [c0000000f95cb5f0] [c000000000d97540] nd_pfn_validate+0x5c0/0x7f0
 [c0000000f95cb6d0] [c000000000d98300] nd_dax_probe+0xd0/0x1f0
 [c0000000f95cb760] [c000000000d9b66c] nd_pmem_probe+0x10c/0x160
 [c0000000f95cb790] [c000000000d7f5ec] nvdimm_bus_probe+0x10c/0x240
 [c0000000f95cb820] [c000000000d0f844] really_probe+0x254/0x4e0
 [c0000000f95cb8b0] [c000000000d0fdfc] driver_probe_device+0x16c/0x1e0
 [c0000000f95cb930] [c000000000d10238] device_driver_attach+0x68/0xa0
 [c0000000f95cb970] [c000000000d1040c] __driver_attach+0x19c/0x1c0
 [c0000000f95cb9f0] [c000000000d0c4c4] bus_for_each_dev+0x94/0x130
 [c0000000f95cba50] [c000000000d0f014] driver_attach+0x34/0x50
 [c0000000f95cba70] [c000000000d0e208] bus_add_driver+0x178/0x2f0
 [c0000000f95cbb00] [c000000000d117c8] driver_register+0x108/0x170
 [c0000000f95cbb70] [c000000000d7edb0] __nd_driver_register+0xe0/0x100
 [c0000000f95cbbd0] [c000000001a6baa4] nd_pmem_driver_init+0x34/0x48
 [c0000000f95cbbf0] [c0000000000106f4] do_one_initcall+0x1d4/0x4b0
 [c0000000f95cbcd0] [c0000000019f499c] kernel_init_freeable+0x544/0x65c
 [c0000000f95cbdb0] [c000000000010d6c] kernel_init+0x2c/0x180
 [c0000000f95cbe20] [c00000000000b954] ret_from_kernel_thread+0x5c/0x68
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Link: https://lore.kernel.org/r/20190919083355.26340-1-aneesh.kumar@linux.ibm.comSigned-off-by: Dan Williams <dan.j.williams@intel.com>