Re: [PATCH] x86/init: Initialize wall clock in get_rtc_noop()

[Thomas Gleixner]

On Mon, Aug 31 2026 at 08:25, Naman Jain wrote:
> get_rtc_noop() is used when an RTC is unavailable, but leaves its output
> argument untouched. When CONFIG_INIT_STACK_ALL_ZERO is not enabled,
> timekeeping_init() may therefore receive a nonzero invalid persistent
> clock value and warn:
> "Persistent clock returned invalid value"
>
> Initialize the output to zero, the documented representation of an
> unsupported persistent clock.
>
> Fixes: c311ed6183f4 ("x86/init: Allow DT configured systems to disable RTC at boot time")
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Naman Jain <namjain@xxxxxxxxxxxxxxxxxxx>

Reviewed-by: Thomas Gleixner <tglx@xxxxxxxxxx>