How to invalidate cache in kernel driver?

[anish singh]

On Feb 13, 2014 10:29 AM, "m silverstri" <michael.j.silverstri at gmail.com>
wrote:
>
> I have an output buffer in my kernel driver. And that share with my
> hardware, which uses it for output.
>
> When I got an interrupt, the kernel driver will copy the data from the
> output buffer to user space buffer.
>
> How can I invalidate cache after my kernel driver copy the output buffer
And why you have to do that? Do you
see any inconsistency in the current
value of that variable?
>
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