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SubjectRe: [PATCH] xen: Fix implicit type conversion
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On 26.10.21 05:27, Jiasheng Jiang wrote:
> The variable 'i' is defined as UINT.
> However in the for_each_possible_cpu, its value is assigned to -1.
> That doesn't make sense and in the cpumask_next() it is implicitly
> type conversed to INT.
> It is universally accepted that the implicit type conversion is
> terrible.
> Also, having the good programming custom will set an example for
> others.
> Thus, it might be better to change the definition of 'i' from UINT
> to INT.
>
> Fixes: 3fac101 ("xen: Re-upload processor PM data to hypervisor after S3 resume (v2)")
> Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
> ---
> drivers/xen/xen-acpi-processor.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/xen/xen-acpi-processor.c b/drivers/xen/xen-acpi-processor.c
> index df7cab8..2551691 100644
> --- a/drivers/xen/xen-acpi-processor.c
> +++ b/drivers/xen/xen-acpi-processor.c
> @@ -518,7 +518,7 @@ static struct syscore_ops xap_syscore_ops = {
>
> static int __init xen_acpi_processor_init(void)
> {
> - unsigned int i;
> + int i;

I agree with the approach, but could you please fix all the other
similar issues in that file, please?

The same should be done in free_acpi_perf_data() and in
xen_upload_processor_pm_data().


Juergen
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