Re: [Xen-devel] [PATCH 2/3] xen: actually skip the first MAX_ORDER bits in pfn_pdx_hole_setup

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 03.05.19 at 22:50, <sstabellini@xxxxxxxxxx> wrote:
> Fix the issue by passing j+1 and i+1 to find_next_zero_bit and
> find_next_bit. Also add a check for i >= BITS_PER_LONG because
> find_{,next_}zero_bit() on x86 assume their last argument to be less
> than their middle one.

I had pointed out x86 since I knew it has this assumption. Now
that you mention it here, I would have expected you've checked
that Arm doesn't make similar assumptions. 32-bit Arm looks to
do, though (while 64-bit has a dedicated if() to deal with the
situation).

Jan



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