Merge branch 'netrom-fix-all-the-data-races-around-sysctls'

Jason Xing says:

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netrom: Fix all the data-races around sysctls

As the title said, in this patchset I fix the data-race issues because
the writer and the reader can manipulate the same value concurrently.
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Link: https://lore.kernel.org/r/20240304082046.64977-1-kerneljasonxing@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>