Hi.
On Sun, Dec 07, 2008 at 11:17:28PM +0100, Adrian-Ken Rueegsegger (ken@xxxxxxxxxxx) wrote:
> The message schedule W (u64[80]) is too big for the stack. In order
> for this algorithm to be used with shash it is moved to a static
> percpu area.
>
> Signed-off-by: Adrian-Ken Rueegsegger <ken@xxxxxxxxxxx>
> +static DEFINE_PER_CPU(u64[80], msg_schedule);
> +
> static inline u64 Ch(u64 x, u64 y, u64 z)
> {
> return z ^ (x & (y ^ z));
> @@ -89,11 +90,12 @@ static inline void BLEND_OP(int I, u64 *W)
> }
>
> static void
> -sha512_transform(u64 *state, u64 *W, const u8 *input)
> +sha512_transform(u64 *state, const u8 *input)
> {
> u64 a, b, c, d, e, f, g, h, t1, t2;
>
> int i;
> + u64 *W = get_cpu_var(msg_schedule);
This should be protected by preempt_disable(), shouldn't it?
--
Evgeniy Polyakov
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