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Re: [PATCH 5/5] xen/arm: address violations of MISRA C:2012 Rule 11.8
- To: Julien Grall <julien@xxxxxxx>, Simone Ballarin <simone.ballarin@xxxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Thu, 30 Nov 2023 09:45:05 +0100
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- Cc: consulting@xxxxxxxxxxx, maria.celeste.cesario@xxxxxxxxxxx, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Thu, 30 Nov 2023 08:45:20 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 29.11.2023 18:50, Julien Grall wrote:
> On 24/11/2023 17:29, Simone Ballarin wrote:
>> --- a/xen/arch/arm/include/asm/regs.h
>> +++ b/xen/arch/arm/include/asm/regs.h
>> @@ -48,7 +48,7 @@ static inline bool regs_mode_is_32bit(const struct
>> cpu_user_regs *regs)
>>
>> static inline bool guest_mode(const struct cpu_user_regs *r)
>> {
>> - unsigned long diff = (char *)guest_cpu_user_regs() - (char *)(r);
>> + unsigned long diff = (char *)guest_cpu_user_regs() - (const char *)(r);
>
> NIT: I would take the opportunity to use 'const char*' for the first one
> as well.
Considering a similar change likely is being (or is to be) done on x86,
I'd favor not abusing "char *" here. Either use "void *", or - considering
the intended result type - go straight to "unsigned long" (or uintptr_t).
I would certainly ask for that on the x86 side.
Jan
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