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Re: [PATCH v1 10/19] xen/page: fix return type of online_page()
- To: Penny Zheng <Penny.Zheng@xxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Thu, 13 Mar 2025 16:12:30 +0100
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- Cc: ray.huang@xxxxxxx, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Julien Grall <julien@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Thu, 13 Mar 2025 15:12:46 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 13.03.2025 09:30, Jan Beulich wrote:
> On 12.03.2025 05:06, Penny Zheng wrote:
>> This commit fixes return type of online_page(), which shall be int
>> to include correct error value.
>>
>> Signed-off-by: Penny Zheng <Penny.Zheng@xxxxxxx>
>
> While the patch can certainly be taken as-is, ...
>
>> --- a/xen/common/page_alloc.c
>> +++ b/xen/common/page_alloc.c
>> @@ -1764,7 +1764,7 @@ int offline_page(mfn_t mfn, int broken, uint32_t
>> *status)
>> * The caller should make sure end_pfn <= max_page,
>> * if not, expand_pages() should be called prior to online_page().
>> */
>> -unsigned int online_page(mfn_t mfn, uint32_t *status)
>> +int online_page(mfn_t mfn, uint32_t *status)
>> {
>> unsigned long x, nx, y;
>> struct page_info *pg;
>
> ... below here we have
>
> ret = *status = 0;
>
> which aiui will need splitting for Misra anyway. Perhaps a good opportunity
> to do so right here? (I wouldn't mind doing the extra change while committing.
> Yet I can also see that this may be deemed too orthogonal to the main purpose
> of the change here.)
Actually, having thought about this some more, let's just put it in as is.
Jan
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