rust: cpufreq: fix `undocumented_unsafe_blocks` in `PolicyCpu::from_cpu()`

For Rust <= 1.86, Clippy triggers after commit 02c5d7bfa872 ("rust:
cpufreq: reject NULL from cpufreq_cpu_get()"):

    warning: unsafe block missing a safety comment
       --> rust/kernel/cpufreq.rs:700:26
        |
    700 |             NonNull::new(unsafe { bindings::cpufreq_cpu_get(u32::from(cpu)) }).ok_or(ENODEV)?;
        |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        |
        = help: consider adding a safety comment on the preceding line
        = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#undocumented_unsafe_blocks
        = note: requested on the command line with `-W clippy::undocumented-unsafe-blocks`

Thus clean it up.

Cc: stable@vger.kernel.org
Fixes: 02c5d7bfa872 ("rust: cpufreq: reject NULL from cpufreq_cpu_get()")
Assisted-by: LLM
Reviewed-by: Zhongqiu Han <zhongqiu.han@oss.qualcomm.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Link: https://patch.msgid.link/20261018163719.81691-1-ojeda@kernel.org
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>

0 files changed, 0 insertions, 0 deletions