linux-kernel - Re: [PATCH v1 3/4] LoongArch: Use larch_insn_gen

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Message-ID: <3249ca98-6293-a83d-d49b-d1d52827a062@loongson.cn>
Date:   Thu, 13 Apr 2023 09:58:53 +0800
From:   Tiezhu Yang <yangtiezhu@...ngson.cn>
To:     Xi Ruoyao <xry111@...111.site>,
        Huacai Chen <chenhuacai@...nel.org>,
        WANG Xuerui <kernel@...0n.name>
Cc:     loongarch@...ts.linux.dev, linux-kernel@...r.kernel.org,
        loongson-kernel@...ts.loongnix.cn
Subject: Re: [PATCH v1 3/4] LoongArch: Use larch_insn_gen_break() for kprobes



On 04/12/2023 07:08 PM, Xi Ruoyao wrote:
> On Wed, 2023-04-12 at 18:05 +0800, Tiezhu Yang wrote:
>> -static inline bool insns_not_supported(union loongarch_instruction insn)
>> +static inline bool insns_not_supported(u32 code)
>>  {
>> +       union loongarch_instruction insn;
>> +
>> +       insn.word = code;
>> +
>
> I remember Xuerui disliked this change.  Maybe we can add
> __attribute__ (__transparent_union__) [1] for union
> loongarch_instruction instead?
>
> [1]: https://gcc.gnu.org/onlinedocs/gcc/Common-Type-Attributes.html#index-transparent_005funion-type-attribute
>

OK, let me pass union parameter, then define a local variable
to do type conversion for callers, the changes are small and
then the code may be more readable, thank you.

Thanks,
Tiezhu