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Use DEFINE_SHOW_ATTRIBUTE macro to simplify the code. Along with this change, we get additionally: .owner = THIS_MODULE, .llseek = seq_lseek, 1. The llseek method is used to change the current read/write position in a file which can be ignored if you don't use it. 2. The owner is not even a method. Instead, it is a pointer to the module that “owns” this structure; it is used by the kernel to maintain the module's usage count which can be ignored. Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com> Link: https://lore.kernel.org/r/20200917125113.103550-1-miaoqinglang@huawei.com Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>