If registering the function with ftrace has previously succeeded,
unregistering will almost never fail. Even if it does, it's not a fatal
error. We can still carry on and disable the klp_func from being used
by removing it from the klp_ops func stack.
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Reviewed-by: Petr Mladek <pmladek@suse.cz>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
0937e3b025