On Tue, 20 May 2008 17:38:20 +0800
Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> wrote:
> On Tue, May 20, 2008 at 02:31:29AM -0700, Andrew Morton wrote:
> >
> > So here you're using it for "dma aligment" whereas crypto is using it
> > (or ARCH_SLAB_MINALIGN!) for "cpu 64-bit alignment".
>
> No the 64-bit alignment is just an example. The purpose of
> CRYPTO_MINALIGN is pretty much the same as ARCH_KMALLOC_MINALIGN,
> i.e., the minimum alignment guaranteed by kmalloc. The only
> reason it exists is because ARCH_KMALLOC_MINALIGN isn't defined
> on all platforms.
struct ablkcipher_request {
struct crypto_async_request base;
unsigned int nbytes;
void *info;
struct scatterlist *src;
struct scatterlist *dst;
void *__ctx[] CRYPTO_MINALIGN_ATTR;
};
Does someone do DMA from/to __ctx?
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