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

[Roger Pau Monné <roger.pau@xxxxxxxxxx>]

On Thu, Mar 15, 2018 at 11:58:40AM +0000, Andrew Cooper 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: Roger Pau Monné <roger.pau@xxxxxxxxxx>

Thanks, Roger.

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