Re: [Xen-devel] [PATCH 1/3] x86/pv: Avoid locked bit manipulation in register_guest_callback()

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 15.03.18 at 12:58, <andrew.cooper3@xxxxxxxxxx> wrote:
> Changes to arch.vgc_flags are made to current in syncrhonous context only, and
> don't need to be locked.  (The only other changes are via
> arch_set_info_guest(), which operates on descheduled vcpus only).
> 
> Replace the {set,clear}_bit() calls with compiler-visible bitwise 
> operations.
> 
> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>



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