linux-kernel - Re: [PATCH v2] xen: Fix implicit type conversion

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Message-ID: <01fd083e-e9a6-c019-0a74-bf28b2982412@suse.com>
Date:   Tue, 26 Oct 2021 09:36:23 +0200
From:   Juergen Gross <jgross@...e.com>
To:     Jiasheng Jiang <jiasheng@...as.ac.cn>, boris.ostrovsky@...cle.com,
        sstabellini@...nel.org
Cc:     xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] xen: Fix implicit type conversion

On 26.10.21 09:32, 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@...as.ac.cn>

Reviewed-by: Juergen Gross <jgross@...e.com>


Juergen


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