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When probing the open-dice driver with PROVE_LOCKING=y, lockdep complains that the mutex in 'drvdata->lock' has a non-static key: | INFO: trying to register non-static key. | The code is fine but needs lockdep annotation, or maybe | you didn't initialize this object before use? | turning off the locking correctness validator. Fix the problem by initialising the mutex memory with mutex_init() instead of __MUTEX_INITIALIZER(). Cc: Arnd Bergmann <arnd@arndb.de> Cc: David Brazdil <dbrazdil@google.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/20240126152410.10148-1-will@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>