Re: m(un)map kmalloc buffers to userspace

From: Richard Weinberger
Date: Thu Dec 10 2015 - 07:05:03 EST

On Thu, Dec 10, 2015 at 12:40 PM, Michal Hocko <mhocko@xxxxxxxxxx> wrote:
> On Wed 09-12-15 16:35:53, Sebastian Frias wrote:
> [...]
>> We've seen that drivers/media/pci/zoran/zoran_driver.c for example seems to
>> be doing as us kmalloc+remap_pfn_range,
> This driver is broken - I will post a patch.
>> is there any guarantee (or at least an advised heuristic) to determine
>> if a driver is "current" (ie: uses the latest APIs and works)?
> OK, it seems I was overly optimistic when directing you to existing
> drivers. Sorry about that I wasn't aware you could find such a terrible
> code there. Please refer to Linux Device Drivers book which should give
> you a much better lead (e.g.

Also consider using UIO.

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