Re: [XEN PATCH][for-4.19 v4 1/8] xen/include: add macro ISOLATE_LOW_BIT

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

On Fri, 26 Oct 2023, Nicola Vetrini wrote:
> The purpose of this macro is to encapsulate the well-known expression
> 'x & -x' that in 2's complement architectures on unsigned integers will
> give a mask where only the least significant nonzero bit of 'x' is set,
> or 0 if none are set.
> 
> A deviation for ECLAIR is also introduced.
> 
> Signed-off-by: Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>

Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>