[dm-devel] [PATCH v3 01/12] crypto: LLVMLinux: Add macro to remove use of VLAIS in crypto code

[Dmitry Kasatkin]

On 17/09/14 12:22, Herbert Xu wrote:
> On Mon, Sep 15, 2014 at 12:30:23AM -0700, behanw at converseincode.com wrote:
>> From: Behan Webster <behanw at converseincode.com>
>>
>> Add a macro which replaces the use of a Variable Length Array In Struct (VLAIS)
>> with a C99 compliant equivalent. This macro instead allocates the appropriate
>> amount of memory using an char array.
>>
>> The new code can be compiled with both gcc and clang.
>>
>> struct shash_desc contains a flexible array member member ctx declared with
>> CRYPTO_MINALIGN_ATTR, so sizeof(struct shash_desc) aligns the beginning
>> of the array declared after struct shash_desc with long long.
>>
>> No trailing padding is required because it is not a struct type that can
>> be used in an array.
>>
>> The CRYPTO_MINALIGN_ATTR is required so that desc is aligned with long long
>> as would be the case for a struct containing a member with
>> CRYPTO_MINALIGN_ATTR.
>>
>> Signed-off-by: Behan Webster <behanw at converseincode.com>
> Acked-by: Herbert Xu <herbert at gondor.apana.org.au>
>
> Thanks,

Just in case.
I would still follow advice from "Michał Mirosław" to use shash##__desc[]

- Dmitry