On Mon, 14 Nov 2011 09:26:16 -0800
Stephen Warren <[email protected]> wrote:
> Varun Wadekar wrote at Saturday, November 12, 2011 3:23 AM:
> > >> + /* assign new context to device */
> > >> + ctx->dd = dd;
> > >> + dd->ctx = ctx;
> > >> +
> > >> + if (ctx->flags & FLAGS_NEW_KEY) {
> > >> + /* copy the key */
> > >> + memset(dd->ivkey_base, 0,
> > >> AES_HW_KEY_TABLE_LENGTH_BYTES);
> > >> + memcpy(dd->ivkey_base, ctx->key, ctx->keylen);
> > > these really should be writes to mutually exclusive addresses.
> >
> > Why?
>
> To avoid redundant work; there's little point memset()ing a region that's
> going to be copied over the top of immediately afterwards.
plus, why is the memset needed at all?
Kim
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