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Use the DEFINE_SHOW_ATTRIBUTE() macro and simplify the code. Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com> Signed-off-by: Borislav Petkov <bp@suse.de> Link: https://lkml.kernel.org/r/20200919012252.171437-1-miaoqinglang@huawei.com