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Re: [PATCH 10/15] x86/PVH: convert find_memory() to using a rangeset
- To: Roger Pau Monné <roger@xxxxxxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Fri, 16 Oct 2026 10:43:09 +0200
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- Cc: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Teddy Astie <teddy.astie@xxxxxxxxxx>
- Delivery-date: Fri, 16 Oct 2026 08:43:19 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 15.10.2026 17:20, Roger Pau Monné wrote:
> On Mon, Oct 12, 2026 at 10:24:44AM +0200, Jan Beulich wrote:
>> Subsequently we will need to exclude a 2nd range here. To avoid
>> complicating the logic when it needs to cover two ranges, follow the
>> suggestion left in a code comment and convert to using a rangeset.
>>
>> Suggested-by: Xenia Ragiadakou <xenia.ragiadakou@xxxxxxx>
>> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
>
> Acked-by: Roger Pau Monné <roger@xxxxxxxxxxxxxx>
Thanks.
>> --- a/xen/arch/x86/hvm/dom0_build.c
>> +++ b/xen/arch/x86/hvm/dom0_build.c
>> @@ -518,14 +518,38 @@ static int __init pvh_populate_p2m(
>> #undef MB1_PAGES
>> }
>>
>> +struct mem_info {
>> + size_t size;
>> + paddr_t addr;
>> +};
>> +
>> +static int cf_check __init _find_memory(
>
> I don't really like underscore prefixed functions, I would rather name
> this check_memory_range() or similar.
A single leading underscore followed by a digit or a lower-case letter
matches what is "always reserved for use as identifiers with file scope
in both the ordinary and tag name spaces". I.e. I not only see nothing
wrong with such a use, but I consider it actively encouraged.
Jan
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