On 09.03.23 15:48, Arnd Bergmann wrote:
On Thu, Mar 9, 2023, at 15:18, Linus Walleij wrote:
On Thu, Mar 9, 2023 at 2:53 PM Andy Shevchenko
<andriy.shevchenko@xxxxxxxxxxxxxxx> wrote:
Yups. And I think the solution looks something like this:
u8 obuf[LJCA_GPIO_BUF_SIZE] __aligned(8);
u8 ibuf[LJCA_GPIO_BUF_SIZE] __aligned(8);
__aligned(4) if it's 32bit DMA I guess? 8 always works that's
why we use it all over the IIO subsystem.
I think it must be __aligned(ARCH_DMA_MINALIGN), to account
for architectures with non-coherent DMA.
In theory, yes, you can do that.
Is that a better solution than using what kmalloc() is
designed to provide. I don't think so.
Regards
Oliver
