Re: usb_get_status(): what a weird implementation !

[Francis Moreau]

On Mon, Jun 30, 2008 at 3:51 PM, Oliver Neukum <oliver@xxxxxxxxxx> wrote:
>
> If your buffer is smaller than CACHE_LINE_SIZE it should work.
> However, this needs input from people who understand DMA in and out.

yeah, that's the reason why it's a hack.

Maybe adding a new helper in  the dma API would be better...

> But how large is 2 * CACHE_LINE_SIZE compared to the kernel stack?

CACHE_LINE_SIZE = 32 bytes is common for embedded systems I guess.
For big system, I dunno.

Kernel stack size is usually  4KiB.

-- 
Francis
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