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SubjectRE: [patch 08/15] x86/vdso: Move VDSO clocksource state tracking to callback
From: Thomas Gleixner <> Sent: Tuesday, January 14, 2020 10:53 AM
> All architectures which use the generic VDSO code have their own storage
> for the VDSO clock mode. That's pointless and just requires duplicate code.
> X86 abuses the function which retrieves the architecture specific clock
> mode storage to mark the clocksource as used in the VDSO. That's silly
> because this is invoked on every tick when the VDSO data is updated.
> Move this functionality to the clocksource::enable() callback so it gets
> invoked once when the clocksource is installed. This allows to make the
> clock mode storage generic.
> Signed-off-by: Thomas Gleixner <>

Reviewed-by: Michael Kelley <> (Hyper-V parts)
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