nfsd: use DEFINE_SHOW_ATTRIBUTE to define nfsd_file_cache_stats_fops
[ Upstream commit 1342f9dd ] Use DEFINE_SHOW_ATTRIBUTE helper macro to simplify the code. Signed-off-by:ChenXiaoSong <chenxiaosong2@huawei.com> Signed-off-by:
Chuck Lever <chuck.lever@oracle.com> Signed-off-by:
Sasha Levin <sashal@kernel.org>
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