Re: [PATCH v7 10/12] crypto: x86/aesni - Use the proper data type in struct aesni_xts_ctx

[Eric Biggers]

On Wed, May 24, 2023 at 09:57:15AM -0700, Chang S. Bae wrote:
> +static inline unsigned long aes_align_addr(unsigned long addr)
> +{
> +	return (crypto_tfm_ctx_alignment() >= AESNI_ALIGN) ?
> +	       ALIGN(addr, 1) : ALIGN(addr, AESNI_ALIGN);
> +}

Wouldn't it be simpler to make this take and return 'void *'?  Then the callers
wouldn't need to cast to/from 'unsigned long'.

Also, aligning to a 1-byte boundary is a no-op.

So, please consider the following:

static inline void *aes_align_addr(void *addr)
{
	if (crypto_tfm_ctx_alignment() >= AES_ALIGN)
		return addr;
	return PTR_ALIGN(addr, AES_ALIGN);
}

Also, aesni_rfc4106_gcm_ctx_get() and generic_gcmaes_ctx_get() should call this
too, rather than duplicating similar code.

- Eric