tmpfs: the mount and remount results are inconsistent.

【标题描述】能够简要描述问题：说明什么场景下，做了什么操作，出现什么问题（尽量使用正向表达方式）
【环境信息】
软件信息：
1） OS版本及分支所有
2）内核信息
3）发现问题的组件版本信息
如果有特殊组网，请提供网络拓扑图
【问题复现步骤】
If nr_blocks is set to 0x8000000000000000, the mounting is successful.

  # mount tmpfs /dev/shm/ -t tmpfs -o nr_blocks=0x8000000000000000

However, when -o remount is used, the mount fails because of the
check in the shmem_reconfigure()

  # mount tmpfs /dev/shm/ -t tmpfs -o remount,nr_blocks=0x8000000000000000
  mount: /dev/shm: mount point not mounted or bad option.

【预期结果】
mount and remount results are inconsistent.
【实际结果】
描述出问题的结果
【附件信息】
比如系统message日志/组件日志、dump信息、图片等

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