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cxl/pmem: Enforce keyctl ABI for PMEM security
Preclude the possibility of user tooling sending device secrets in the clear into the kernel by marking the security commands as exclusive. This mandates the usage of the keyctl ABI for managing the device passphrase. Reviewed-by: Davidlohr Bueso <dave@stgolabs.net> Reviewed-by: Dave Jiang <dave.jiang@intel.com> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Link: https://lore.kernel.org/r/166993221008.1995348.11651567302609703175.stgit@dwillia2-xfh.jf.intel.com Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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